Do you bang you sister?

Not yet

As tempting as Robin is, and fuck, she is so tempting in that bikini, there isn't enough time left to fool around before you have to leave. At least you have your little prize in her suitcase to look forward to. As you're leaving your bedroom with your suitcases to load them into the car, you grab your sister's toned rear and whisper into her ear, "I am so going to fuck this ass up in that lingerie tonight."

Robin giggles and replies, "I will hold you to that, stud. Now be a dear and carry my suitcase for me." She holds her sheer skirt to the side and gives her butt a light smack and looks over her shoulder to give you a wink. You almost growl as you grab her suitcase. This girl is going to get it. It's hard not to just say fuck the trip and take her right now, but somehow, you resist.

When you get to the car, you aren't surprised to find your mom, Heather packing the bags instead of your father. She is struggling to lift one of the heavy bags, so you reach over and help her get it into the car, forgetting about the rock hard erection your sister gave you earlier, being reminded when it pushes up against your mother's generous rear. Due to the awkward position, you are **** to grind into her ass for some time before getting the bag in the car. Luckily, you have the notebook close at hand and before your mom can even say anything, you modify the rule from "siblings" to "family members." You breathe a sigh of relief as you step back and your mom turns around.

Instead of an expression of anger or embarrassment, your mom has a look of regret on her face. You didn't see that one coming. She puts her hands on your chest. "I thought we agreed not to do this anymore." Ummm, what? Looks like your rule change had some unintended side effects. "What we did... I don't regret it at all. You and Robin were on a break, and me and your father were having problems..." Those two were always having problems, and it was rarely her fault. "But Larry and I have patched things up, a bit, and you and Robin are dating again, so I think it's best we both just keep our distance so nobody gets hurt." Despite her words, you can still see the regret in her eyes. Clearly, whatever happened between you two, some part of her wants to start doing once more.