Take her ass while Greg fucks her pussy

"How about while Greg has sex with you, I'll take you from behind?" Greg keeps nodding, pulling his cock back out. Between your power and his desperation, he's completely willing to let his own son fuck his wife up the ass, just so that he could finally get off.

"What!? No. Absolutely not. I have never done that in my life, and I never will--Especially with my son! NO." Melanie puts her foot down about as hard as she can... Unfortunately, that doesn't work on you.

"Greg needs this," you state simply and powerfully. "This is how it's going to be."

"I..." Melanie is taken aback for a second as your ability forces her brain to rationalize the clear, unambiguous demand. "I mean, if both of you need this... What kind of a mother or wife would I be if I turned either of you--"

The speed with which Greg moves surprises you both. Diving onto the beach towel, he grabs Melanie roughly and pulls her on top of him. She gasps as her husband yanks aside her skimpy bikini, then penetrates her in one swift motion. Greg lets out a groan of pleasure and relief, as if a huge weight had been lifted off his shoulders.

As he begins to bounce Melanie on his lap, you eye her rear end with lust. The moment he pauses to savor the moment, you take the opportunity to pull down her bikini bottoms and push your cockhead against her asshole. Her bikini rolls over itself, the tight strap biting into her plump butt and separating the top and bottom into two fleshy masses.

"B-be careful back there," Melanie stammers,glancing back at you, "I've never done this before." She seems pretty concerned about protecting her virgin ass.