My brother
When I was in my teens my brother talked me into showing him my boobs which then worked into him touching them, I thought it was no big deal. His next step was asking if I would give him a hand job which I was a little curious about anyways so I did that a few times to him. He was very ecstatic about the whole thing and I told him not to tell any of his friends about this or nothing else was going to happen. After a few weeks I was pretty impressed that I had not heard or seen anything about it so one day while I was massaging him again I leaned over and started sucking and licking his penis. He was so shocked and told me that it felt so good, I kept it up and knew he would be cumming fast with this new feeling so I finished him off not really wanting to swallow him. A few days later he came to me and I told him really you want another one already but he told me he really wanted to see what it was like to perform oral on me. I thought about it for a moment then thought okay why not with all we had already done to this point.
He was horrible at it, not that I had any experience but if I could masturbate better than he was with his tongue then this was bad. I gave him a few pointers and he was much better after that.
My oldest sister was the first girl I had sex with she the one that showed me how to have sex with a girl.
I was 12 and she was 13 but she had experience our uncles had been fucking her over a year she told me I caught one of them fucking her that's why she gave me pussy so I would not tell our parents.
Your brother obviously needs some pointers in regards to giving oral sex and that's where you can help!! Many siblings learn about sex from each other and it really is the best way to learn.
Be my sister now