Underwear only?

From Create Your Own Story

Since your dick is so hard, there's really no sense in putting too much clothing on. It's just going to make the problem worse, and walking around in nothing but your undies while sporting a massive erection might lead to some fun adventures. You step into a fresh pair and make your way outside. It isn't long before you run into someone else in the hallway.

Who are they?

• Your older Sister, Stephanie
• Your younger sister, Mandi
• Your mom, Lisa