Suggest Zoe (getting blown).

"You go on ahead, hon. I..ah...have to finish up my shower here and....uh...do a couple things in the office. Take Zoe with you. If she's going to be staying here, she can...mm..pitch in."
"Oh...alright babe. I guess that's fine." She seems to accept your suggestion.
And with that, you hear Jenna retreating. When you hear the front door open, and then close, you finally start breathing again. Never in your life have you been that close to disaster. Tara has given over all pretense of subtlety. She's moaning like a little whore, and slobbering on your cock with gusto.
"Jesus Christ, Tara. You need to hurry up or stop for now... but..... aaaaooohh.....fffffuuuuuuck!!" As if your words were a challenge, Tara has muscled past her throat barrier. She goes balls deep, with her nose grazing your pubic hair. You have no control over what comes next, as a torrent of cum spurts into her throat and mouth, nearly buckling your knees.

She coughs and splutters a little, spraying cum droplets onto the towel and your legs. But she looks up at you with those pale blue eyes, smiles, and gathers all the cum and spittle up and into to her mouth. Like a good girl, she shows you her work before getting it down in one gulp.
"Tasty. Jared's cum is kinda nasty, to be honest. But yours is much sweeter. Must be your diet."
You stand there, gobsmacked, as she re-clasps her bra, stands up, and plants a big kiss on your lips. "See you later, alligator." She winks at you. Then she moves to the door, cracks it to make sure the coast is clear, and slips away with a bounce in her step.

You contemplate what just occurred for a moment. You've never cheated on Jenna before...okay that's not strictly true. When Zoe got married, you had gone to Dane's bachelor party, and...you had gotten a blowjob from the stripper on a dare from Dane.

You decide that this doesn't have to be any different. You hope that it doesn't.

You get dressed, tidy the house for a little while before calling to check on the progress of the travelers. While you are on the phone, Tara and Jared emerge from his bedroom. She's dressed in an acid-washed pair of booty cutoffs, knee high athletic socks and black Skechers, with a tight, v-neck black tshirt over her VS bra. You take a moment to admire her curves, until Karen's voice on the phone snaps you out of it.
Tara kisses Jared, perhaps a little brazenly for being in front of you, but you think maybe it's for your benefit. Jared, your clueless dickhead progeny, just enjoys it, and then smacks her ass as she turns plop down on the couch to watch SportsCenter. Apparently, she is a big Dodgers fan.
After hanging up, you instruct Jared that he's going to help get the house ready if he thinks he's going to just enjoy dinner and then waltz out of here to the concert tonight.
"Whatever, Dad. I'll do what needs doing."
By the time Jenna returns with the groceries, the house is prepared for the new arrivals. Zoe appears to have picked up her car from her apartment on the way, as her beat up Malibu is now sitting in the driveway.

Just as the last of the items gets put away, you hear the twin honks of horns as Karen, Jack and Allison pull into the driveway, with Riley just behind them.