You kept growing fat. The boys of the frat liked the cushion. You didn't know how that was going to happen.
As your little vagina developed you found out that some of the boys liked to fuck girls but were just fine with you having a dick if they could fuck you like a girl. The only problem with that was that you would get pregnant. But that was fine with the frat. They sold off your babies to help pay for the upkeep of the house. And the more you had the more they would earn. And unfortunately with you getting pregnant it made it easier for you to gain weight.
And unlike other girls you kept getting pregnant even when you were already pregnant. All were at various stages in your pregnancy. This made your tits extremely large to feed your babies. But fortunately you only got pregnant when you were fucked in your vagina. All the ass reamings were just fun for the frat boys. Not that you really enjoyed it. You would have to bend over forward and hold your ass cheeks open. They tried to lay you on the bed and lift your legs but you had gotten too round to life your legs and even if you had your belly would have obscured your ass.
That first year you had a child every week starting at the summer break. That was about 9 months from the first time you were impregnated. That 3 months of summer vacation gave you a little break. None of the frat boys that stayed wanted to impregnate you so after all the babies had been birthed and adopted out you looked somewhat deflated. But that soon was building back up again. And this time it was many many more babies in your belly. Every frat brother fucked you. They saw what a positive cash flow you were making to the frat and they all had to do their part.
Not that you didn't get ass reamed too but they eventually put you in the basement in a sling lift. Making it easier to lift you into position. You got enormous.