Is it normal to dream about your cousins husband in an erotic way?

Well about a year ago I had a dream about my cousins husband and the dream was Very bizarre. I suppose I was secretly having sex with him in my house on my hallway floor in front or the restroom and in the dream my mom was in the shower and both him and I were keeping quiet as my mom showered and I don't know if position matters or not but I was on my knees on top of him and he was sitting up. And I think the dream felt very realistic. I can't be too sure because I'm a virgin so I don't know how "IT" is supposed to feel but it felt very real! But any way I have to know...Is it normal to have dreams of that degree? And a few weeks ago I had another dream about him but in this dream we were at his house and I was on one side of the couch and he on the other and I was watching T.V. and he was staring at me asking me questions about a date I'd gone on with a boy. And in the dream I looked at him and noticed he looked at me with such desire and lust. I don't know What it means but is it normal?