This story is 100% true and happened to me when I was in college. It involves a couple of girls from my previous story (https://www.reddit.com/r/gonewildstories/comments/4buyd3/hot_tub_fuck_machine_m21f20m21f20m20f18m23f21/): my girlfriend Lilly and a mutual friend of ours, Ella.
Ella had only just turned 18 and was an insatiable nympho. She had drunkenly confessed that she was attracted to both of us, particularly Lilly. She was a little on the larger side: she had a bit of a belly, but also had enormous G-cup tits and a pretty face. She held her weight well, her entire body felt soft yet firm, she wasn’t floppy or saggy anywhere. I had never particularly been into larger girls until I fucked Ella in a hot tub a few weeks earlier. It was a completely different experience fucking someone a similar weight to you and there were so many curves to caress and hold on to.
On the other hand, Lilly was a much more slight and petite girl, she was curvy in her own way, with shapely D-cup tits and voluptuous butt. She was a beautiful mixed race girl with lovely caramel skin (ie think Mia Khalifa in the face, even down to the nerdy glasses).