Interrupt.

You've seen enough. You quietly open the door to the hallway, and slam it shut. "Hey Jenna! You around?"
"...yeah babe. I'm in the bedroom. Scotty was just telling me what he fixed in the bathroom."
Sure.
"Yeah it looks all finished." you open the door, and now Scotty is standing far from Jenna, who's sitting on the bed, a white shawl wrapped around her.
"Whoa, baby. You're wearing my present!" you smile. Jenna smiles back.
"Y-yeah. Time to break it out, I guess!" she stands up and gives you a peck on the lips, but you decide you want more, and kiss her passionately, while looking over her shoulder at Scotty.
Your eyes meet, and the unspoken communication is received. This is mine. Go bark up a different tree.
"Well, ahem, I'll just... leave the invoice on the table downstairs, James. Ma'am." He awkwardly shuffles into the bathroom.
Jenna pulls away, giving you an annoyed look. "What's the problem, James?"
"What's the.... Jenna, come on. I wasn't born yesterday." You cross your arms. "Scotty's got a thing for you. Everyone knows it. Here you are, alone in our bedroom with him in a skimpy bikini." you keep your voice quiet.
"You can be such an asshole sometimes, James! I wasn't.. I didn't do anything." She spins on her heel, giving you her back.
"Jenna..." you try to put a hand on her shoulder, but she shrugs you off.
"I'll be down to the pool in a minute." Her tone is frosty.
You head downstairs. Scotty's already drawing up the invoice. When he sees you, he starts making busy with his tools, not looking at you.
"So...you're all set. Just settle up any time next week, if you don't mind. I'm... I'm going to hit the road. I'll see you around..." he starts heading for the front door.
"Oh you can't stay for dinner, Scott?"
He turns to look at you, and his eyes tell you that he knows the score. "Can't swing it unfortunately. Maybe another time."
"That's a shame." Your voice is flat.
"See ya, James.." he turns towards the stairwell, "...Jenna." Jenna is at the landing. You aren't sure how much she heard.
Jenna stalks past you toward the pool. You could probably make snow cones from the frost that's rising between her eyes and yours.
You aren't going to feel guilty. You saw what was happening. You head down after her. You're determined not to let this ruin a lovely day. Jenna swipes a huge margarita from the pitcher, and plops down next to her sister. Within minutes of gabbing, both sisters are shooting frosty glances your way. For fuck's sake. How did this get turned around on you? She was the one....
{if KaylaSexLvl >1
} You suddenly think on the days events so far, and realize that maybe taking the high road is a little disingenuous. A night on the couch would be getting off easy for what you've done. {elseif TaraSexLvl >1
} You suddenly think on the days events so far, and realize that maybe taking the high road is a little disingenuous. A night on the couch would be getting off easy for what you've done. {else
} You just sigh. Nothing to be done about it now. Just endure, and probably end up on the couch tonight. {endif
} You pour yourself a margarita. Some people say there's a woman to blame, but you know....

It's your own damn fault.