When I was 13 I was baby sitting my 7 year old brother and his friend while my dad was out. I always wear just my panties and bra when I'm home alone with him. I liked watching him get all excited. his friend couldn't stop staring at me. I was in my dads office on the computer and I could hear them talking about vaginas and sex. I heard my brother tell his friend that he's seen me naked humping the chair and looking at naked guys on the computer. they started talking about their penis's and my brother isn't circumcised but his friend said that he was. I was so horny I needed to see.

I yelled at them that they needed to get ready for bed and that they should shower from being outside all day. Then I got the idea that they should jump in dads Jacuzzi instead. once the tub was full they got down to their underwear and then asked if they should put swim shorts on. I told them just go naked their both boys it doesn't matter, I walked out then took a peak at their bare bums climbing in with the tv on and a soda.

Few min later I went back in but only had my house coat on and took my panties off. My brothers friend was out of the tub having a pee, He was embarrassed but then I told him I wanted to see and opened up my house coat to show him my vag. My brother couldn't see what happened he was still laughing about me seeing him pee. He looked like he was in heaven and even started to get hard, I told them that I heard their conversation earlier and then I asked them who they thought had a nicer penis. they were laughing and arguing until they realized that I dropped my robe and was standing away from them and grabbing a towel to wrap myself. My brother asked me what I was doing. I said I was going to have a shower. jokingly asked them if they both had boners now after seeing my bum. His friend said he did so I told him to prove it and stand up. He wouldn't stand but he stuck it up through the bubbles. I had to know so I just reached into the water and touched my brothers dick. He was hard as a rock.

They promised me that we could keep a secret and I told them that they could touch my vagina. greatest night ever.