Is it normal for my cousin to give me blowjobs?

so my cousin likes giving me blowjobs. one day i just got out of the shower ( i usually jack off before i get dressed), aparrently my cousin was visiting. she must of come when i just got out of the shower. no one was home but me. so she walked into my room (i forgot to lock it) and she had the most suprised look on her face. she came in right as i came. but seeing her when i was cumming made me cum even more since she had huge boobs. after tht brief moment, she locked the door behind her and came over and got on her knees. she gave me a really dirty (hot, sexy) look and grabbed my dick. she played with my sack for a little bit until i got horny. as soon as i got a boner, she said "ive always wanted to do you" and then started sucking. i wont go into detail but then we start doing it more and more. is that normal ( that she blows me all the time)