On their asses?

"Here it cums!" you yell and pull out of Maggie's pussy.

You start to jerk your cock onto her ass and shoot your load.

"Oh fuck yeah," Maggie says, looking back at you. "Cum on our asses."

You shoot the first two streams onto Maggie's ass and then turn to shoot the next two onto Michonne's big black butt as she twerks it for you. Then you move back to Maggie's sweaty bum and shoot the rest onto hers. When your orgasm ends, you slap their asses with your cock and rub your cum into their ass cheeks with it.

Finally, the three of you collapse onto the love seat, laughing.