Lie

You spout the first thing that pops into your head.

"I guess she went to the bathroom. She was right here." You shrug, hoping she believes it. Your dick and libido stir thinking about what you just did. She seems to accept what you say and crosses the room to kiss you. You're rock-hard by the time she takes her tongue out of your mouth.

"God, that was one of the worst shifts I've had in a while," she complains. "I need to relax."

Her smile tells you exactly what's on her mind. Heather walks back in, smiling mischievously behind her sister's back. She quickly flashes her tits before her sister can turn around. Once she does, the two quickly chat, Ashley still not suspecting your infidelity.

You let out a small breath of relief and go to the fridge for some drinks, taking the opportunity to adjust your cock in your pants as you think about Ashley, then Heather, then both of them together. You grab a few beers, then head back into the living room and sit between the girls on the couch.