Is it normal that i am really in to my friends mom

I went over to my friends house to get my phone that i left there the day before when i was there my friends mom answered the door and invited me in. when i was in there she asked me where i left my phone and i answered with i dont know. so as we where looking for it she bent over and i saw we panties. and that got the blood flowing a little. so when she was looking by her bed i saw her boob slip out and i got a boner. when she saw she chuckled and said its ok. me very embarrassed said sorry and thats when we went to the dinner table and as we were sitting there i pulled out my dick and started to stroke it. when she saw she asked if i need help and i said sure then i tit fucked me. Is it Normal