Small boobed GF rides stepmom's big black cock

My girlfriend's tits are so fucking tiny, it's kind of a turn-off, if you ask me. But her stepmom, now she's got some serious jugs. So, early in the morning, I decided to make a move on that big black cock. I started off by giving it a nice, deep handjob, working that monster up and down. Then, I had her ride me, bouncing on my cock like a pro. The sight of her huge tits bouncing as she rode me was just amazing. I could barely hold back, and soon I was blasting all over her tiny tits. The contrast was just too good to resist. I hope my girl doesn't mind sharing me with her stepmom, but I'm pretty sure she'll understand. After all, we all need a little variety in our lives, right?.