Opt for some exercise

While you certainly have been burning up a lot of calories with Vanessa, there are some types of exercise that you can only get at a gym, and you decide that's where you need to go this morning.

You take your time finishing up with Vanessa and then throw on some workout clothes, pack a gym bag, and head for the door.

As you and Vanessa pass your sister's room, you can't help but notice the activity through the open door. Candy is on her hands and knees, being fucked from behind, doggy-style. You expected it to be the punk rocker she spent the night with, but it isn't a green-haired freak drilling her at the moment. Instead, it was your twin brother, Bryan.

This isn't the first time you've seen Candy and Bryan having sex. As a matter of fact, the last time you saw Bryan with his cock inside Candy, it was from much closer, as you sat in front of her, with your legs spread, thrusting your cock into her hungry mouth.

Vanessa stops and looks hungrily in at the rutting couple. She's definitely interested in joining in, and she looking at you, questioningly. Should you join her and make it a foursome, or stick with your plan about going to the gym?