Showed my friend how I suck dick by blowing her bf

My friends know that I'm a slut and I have a reputation of being very good at it. One of my friends has been with her boyfriend for about a year and she said that the sex is really good but she doesn't think she does a good job blowing him and was asking for advise.

I was telling her things to do with his dick but said it would be easier to show her. I was going to say that I'll get one of my dildos but she offered his dick before I said anything, that took me by surprise but she said she's okay with it and thought it'd be hot. Just as long as it was just head.

So that night she told him and he came over and I showed her certain things I do and then she would try them on him. Then she told me after taking his dick out of her mouth that he had never cum from head, at least that is what he says. He said it was true, so I took that as a challenge and worked my magic. I made him cum in my mouth about five minutes later right in front of her.