Reluctantly and with some rules.

"Fine, but there are some ground rules!" Mari forcefully replied. "You can't cum in me and absolutely no anal! Got it?" she asked. "Of course" John answered with a smirk. Mark was also smiling except for a far different reason. Moving around, this time it was Mari between her partner's legs as she pulled off his boxers. Mark wasn't gay by any means but even he was impressed with John's dick when it sprung out of his underwear. He had to guess it was at least 7.5 inches maybe 8. He had been expecting the small girl to have some trouble handling the cock but was surprised when after a few licks to the head she took it almost to hilt.

From his position in the closet Mark had a side view of Mari on her knees with her ass in the air and sucking on cock. It took nearly all of his willpower to not stop time and fuck her right then and there, but this was their time. He could always come back at another time to fuck her senseless. After about 10 minutes of sucking the couple changed positions again.

This time Mari remained relatively unchanged and John got behind her preparing to fuck her doggystyle. She gave out a low, throaty moan as his length slid into her from behind. Their tempo started off slow with John gradually withdrawing until just the tip was inside her and then slowly plunging back in. Over the next 30 minutes the two increased in speed and intensity until Mari was moaning like a whore and John was grunting like an ape. Finally the moment Mark had been waiting for came when he heard John say, "Babe, I'm almost there." Mari replied, "Okay, just remember not to finish inside me!" Groaning John quickly withdrew his dick from her cunt and Mark immediately stopped time.

Exiting the closet and examining the two Mark saw that his timing couldn't have been more perfect. A bead of jizz was just beginning to exit John's cock. If Mark wouldn't have stopped time he would have came on her ass and her back. But that wasn't part of his plan. Reaching forward, Mark felt weird grabbing another dude's dick but he needed to in order for his idea to work. Angling John's cock back down Mark pointed it at Mari's tight asshole. He then scooted John forward a couple inches until the first inch or two was lodged snugly inside her butt. Smiling at his handiwork Mark gave one of her tits a squeeze before returning to the closet. He assumed that because she wouldn't let John fuck her ass that must have meant she was an anal virgin. He could only guess what her reaction would be as he started time.