All characters are over 18, anything that makes it seem otherwise is due to the writers poor ability rather than intention.
Covered in Cum. Chapter 4
I awoke from my slumber in a very uncomfortable position. I seemed to be facedown on a pool chair with easily detachable bands, my midsection was a bit smaller than when I passed out in the pool the previous day. It was now only the size of a mini fridge instead of a laundry machine. My tits were hanging awkwardly between the bands of the chair, currently they were very full, heavy, and dripping milk at a steady pace. One of my family had realized that and was napping underneath, getting a meal while snoozing. This aunt was notorious in our family for sleeping anywhere and any time, and she was such a heavy sleeper that it was rumored that she napped through giving birth one time. On the subject of sleeping, I feel like I was awakened by something, something long, hard, and ramming my ass! Turning to see who was fucking my ass I saw my mother leisurely humping me, her tits gently bouncing to the rhythm.
"Good to see you are awake, if you had stayed passed out any longer I might have taken you to the doctors." My mom just kept at my ass while talking, with no change in her pace.
"How long have I been asleep?!" I asked, giving up on my efforts to get up until my ass was done being used.
"A couple days, since you aren't going anywhere anyway, do you want to come along to the birthing cabin? Your sister is due any day now and you know how horny she gets when she's almost due."
I sighed, contemplating my options, then did a sharp intake of breath as my cocks let off a quick load. With that I decided to join in, maybe someone would put me on my back and ride me. By the feel of it my dicks hadn't been into anything for days!
An hour later I was loaded into the van, also in the van was my sister Mary, each of her three tits were dripping milk at a constant rate and were swollen to the point of being unable to wear a shirt, another reason for giving up shirts is that her stomach was about as large as mine but with kids and not cum. My Daughter Kristy was also in the van, apparently she had tried to join the senior cheerleading team and their hazing ritual was to get fucked by the whole team and not cum once, she apparently made it halfway through then failed, so she didn't make the team and she matched me for being filled with cum. Tara from the first chapter joined as well, it seems that with her small tight body she got stuck on Mary's cock for the past couple days, and Mary just kept walking around with Tara just stuck on her dick, so she was now as stuffed as the rest of us.
The four of us were loaded into the bus, my mother and several of my sisters joined to keep us company, I might describe them if I ever get around to writing about them. The bus driver, though, deserves description, she was a bit chubby, rather large boobs, around F cup if I had to guess, her dick was magnificent! 18 inches wide and 2 foot long, below her cock was a set of stupendous balls, where a chair for the driver should have been was just a backrest, her balls were each the size of large exercise balls and she was sitting on them instead of a chair. With that makeup it was obvious she was the gas tank, and if you didn't know our cars and other vehicles run off cum, a scientist years ago got her lab flooded by an intern (do I really need to say with what?) and after cleaning up forgot to clean the test tubes so the method for cumbustion was created. So anyone out there who wonders where all the discharged cum goes, you now know that it fuels all vehicles and even a space program that sends excess cum into the universe, that will probably not come back to fuck us over...