Invite her to share the shower with you
From Create Your Own Story
Monicka just looks at you a little oddly, then smirks. "Okay, bro. If that's what you want to do." She climbs into the shower with you. "Just don't try anything funny, alright." You nod awkwardly, trying your hardest not to get a hard on while staring at her tight, wet body. You awkwardly change sides a couple times, switching in and out of the water. Each time gets a little more weird as your dick hardens by the minute. While she stands in front of you, getting the soap all foamed up in her long red hair, you feel yourself starting to stroke your cock. You don't want to be doing it, but your sister is just too hot for you to control yourself. You can't tell if you moved forward, or if she moved back, but all of a sudden, her ass is grinding against your dick, and Monicka is starting to moan. You decide to..
