My niece is 16 years old,so we sat down to watch a movie,she goes sits on the couch, i'm sitting on the recliner,she threw the blanket over herself she started scratching herself down below,i didn't want her to think i was staring at her cause after all she is my niece,she had her hand in her panties as what it appears not sure,she would take her hand out of her panties to smell her fingers,she took the blanket off of her,i got a erection yes i know sad i kept saying to myself this is totally wrong of me,i know i should of told her to excuse herself to go to her bedroom or to the bathroom,this went on for least a hour,mind you i kept telling her,can we like watch this movie than she stood up came over to me,ask me to look to see if she had a rash down there, her vagina was hairy, vagina lips were swelled,she even spread her vagina open to show me,she was so red inside,i tried turning my head but couldn't do much,i was feeling upset and so embarrassed this was even going on,finally she went into the bathroom i hate to say this but i masturbated like 3 times,i feel so bad this went on i'm so ashamed of myself,this is my own niece she came out of the bathroom i got up to head to the bathroom she saw the wet spot on my shorts,i had to masturbate again i know it's wrong of me, finally i cleaned up and changed my shorts i came out to watch the movie over again cause it was on the Dvr recording, she was on the couch and looked over me with a smile, i'm just wondering why she did this,there is no excuse for both of our behaviors