Maya blearily opens the door as she's dragging herself in for another morning shift at the library. She sees her manager Susan sitting at the front desk doing some paperwork cheerfully. She was an older woman, though she was certainly still beautiful.
 "Good morning Maya! You ready to help me reshelf before we open?"
 Maya yawns before answering, "Yeah we should get that taken care of."
 The two of them get to work, Susan cheerfully humming while they reshelve books. Using a ladder, Susan climbs up to some of the top shelves while Maya holds the ladder steady. While doing this, Maya yawns and stretches, flexing her body and tilting her head back. As she's looking up, she accidentally looks up Susan's skirt.
 "Is she not wearing any-"
 Her thought is cut off by Susan losing her balance, and suddenly Maya is surrounded by a hot, wet darkness.
 "Oh my god Maya are you ok? What is that inside me? It feels so good..."
 "Mmph!"
 "Are you in me?! Don't worry, I'll get you right out!"
 As Susan stands up, her muscles contract, pulling Maya deeper into her velvety folds.
 "MMPH!"
 "Sorry, I can't control it! I've never done anything like this! It feels good, I can't stop clenching..."
 As she stands and tries to figure out how to push Maya out, her body keeps pulling her in, while Susan unwillingly revels in Maya's squirming. All of her squirming is making it hard for Susan to think, and it contributes to a growing pressure in Susan. Soon, Maya pushes up against a hard wall, and realizes it was her cervix! Upon realizing it, Maya pushes against it in an attempt to get free, but all this does is push Susan over the edge. Maya hears a loud moan coming from Susan, and suddenly all the walls around Maya start contracting and convulsing like crazy. Maya feels them force her against the cervix, and then it gives, forcing Maya into Susan's womb.
 As Maya is forced into her womb, Susan lays on the floor between shelves, riding out the end of her orgasm. As she recovers from it, she looks in awe at her new belly. As someone who's never had kids, but always wanted them, she was now shocked to find she looked like she was pregnant with octuplets! She grabs a shelf and shakily tries to stand up. After she manages to get upright, she starts to talk to Maya.
 "Oh no, I have to get you out of here. But we open in five minutes. I'll grab some books on pregnancy and see if they can help."
 "You've better get me out of here as fast as you can, it's all gross and wet!"
 Susan grabs a couple of books and goes back to the front desk, so she can read them when she has time to when not working. As she works, a couple of people stop by to ask her questions, and look surprised at her stomach, but decide not to say anything. 
 While reading, Susan hums happily to herself, while absentmindedly rubbing her stomach over Maya. She had always wanted to be a mother, and in some subconscious way, this incident was leaving fulfilled. Like this, the work day passes by, with Susan not really finding anything helpful in any of the books.
 Unbeknownst to Susan, as she was working, so was her womb. Maya nodded off to sleep, as there wasn't much to do in there, and as she slept, an umbilical cord attached itself to Maya's belly button, and the womb slowly filled up with amniotic fluid. This shocked Maya as she woke up, as she found herself unable to speak or breathe, though she didn't seem to be suffocating. She tries squirming, but Susan's womb feels even tighter than it did before her nap. Susan, too immersed in her research to notice Maya, continues to read. All Maya can do is listen to Susan's humming, or her conversations with the occasional patrons of the library though it was difficult to hear the other people. It was going to be a long day.
 As soon as she gets home from work, Susan passes out on the couch, tired from carrying around all that extra weight. When she wakes up, she feels extra refreshed and cheerful. She starts talking to Maya.
 "You know Maya, this arrangement might not be so bad. Having you close by all the time is nice, and I love how full you're making me feel. Maybe it would be better if we just stayed like this..."
 Hearing this, Maya squirmed as hard as she could, trying to show her discontent.
 "Aahn~ that feels good Maya. So you agree? Oooohhh, that makes me so happy!"
 Susan goes and tries to hug her belly, wrapping her arms around it and resting her head on top. With Maya in her belly, Susan actually felt like a mother for the first time.
 Maya was distraught. Was this her life now? Stuck in Susan's womb forever? Doomed to be nothing more than a stand-in baby for a middle-aged woman for the rest of her life. Only time can tell.
 Since the library was closed today, Susan decided to have a home movie night with Maya, relaxing on the couch. The whole time, Susan would massage her belly, rubbing and caressing it. She was in bliss.
 Like this, a couple of weeks pass by, with Susan cheerfully going about her regular daily routine, but now with a passenger. Getting up, going to work, making meals, Susan never felt alone anymore. Then one morning, she notices some wet spots on her shirt. She was lactating! While she did notice her breasts getting bigger, as well as her areola getting darker, she didn't think this would happen! Regardless, she didn't mind it really. It was another symbol of motherhood, so as she felt her nipples, she found herself smiling. After eating breakfast, she went out and bought a breast pump to take care of the excess milk.
 When she got home, she sat down and tried it out. After hooking it up and feeling the pressure on her nipples for a couple of minutes, she could feel herself getting wetter too. 
 She slipped a hand into her panties and started circling around her clit. As the pressure of the pumps got higher, so did the speed of her hand. After a couple more minutes, she came harder than she ever had before. This would soon become a daily routine.
 One evening, Maya wakes up from her usual state of napping to the thrumming of loud music, filtered through the womb walls. From what she could tell, Susan was at some sort of party or concert? After a couple of hours of this, alongside some vigorous dancing that had Maya a bit dizzy, Maya could tell Susan was getting into a car and going home, though it felt like Susan was talking to someone...
 That someone was Monica, a woman wearing a leather jacket and ripped jeans who had spotted Susan among the crowd at a concert. Susan was wearing a crop top and short skirt, showing off her belly with Maya in it. As the concert went on, Monica made her way over to Susan and they started dancing together. After the concert, Susan invited her back to her place, especially excited after seeing the bulge in Monica's jeans.
 When the car stopped, and Susan and Monica had gotten home, Maya could feel pressure coming from in front of her, like Susan was being hugged. Then, a minute later, she could hear Susan moaning, and she started shaking back and forth rhythmically. She was having sex! And enjoying herself, from how it sounded. Feeling her hormones flowing through the umbilical cord, Maya couldn't help but start touching herself too. Soon, she finished inside of Susan, and Maya saw a decent amount of cum flowing into the womb. "Hopefully," she thought to herself, "this doesn't become a regular thing."
 But it did, Susan and Monica started meeting up regularly, going on dates and enjoying themselves at home. Monica loved Susan's belly, as well as her voluptuous tits. After having sex, Susan would urge Monica to come nurse from her tits, as she would rather have her drink the milk than the pump. After getting to know each other, Susan told Monica that she has to tell her something.
 "I'm not actually pregnant. This is my former coworker Maya, and she's been living in my womb for the last couple of months."
 "For real?"
 "For real."
 "Wow. That's so fucking hot!"
 That night, Maya saw way more cum than she had ever seen, even before moving into Susan's womb. That night, Maya realized that there was a very real chance that she never would get out of Susan.