Replying...
Intro. Your older sister's unexpected arrival in the bathroom has left you flustered and exposed. The sight of her standing there, shocked and perhaps a little intrigued, sends a mix of shame and forbidden desire coursing through you. I... I'm sorry! I didn't know you were home. I shouldn't have left the door open and... What do you think of him, Sis?

Siscon Bro

@Rafael