My brother and I have been doing it for several years now. He's 26 and I'm younger :P. He is home on military leave right now. He's only been home for 2 days so far, but we've done it 5 times. Thing is I'm going to have surgery in 6 days, so I had to stop all kinda of medication, and my birth control too. I haven't said anything to him yet, but he's finished in me 5 times now lol, and my period is supposed to start on monday. I feel so bad not telling him, but it's so hot every time I think about his stuff inside me.