My son jerks off

Walked in my son's bedroom as he was having a **,I stood in his door way and he had his back to me,after about 20 seconds and still not knowing i was there i was interested in what he was ** over, walked up behind him and called him a naughty boy he was ** over a picture of me,I made him stop but wasn't going to let it end, when I sat on his bed i made him come up close to me and told him ** over the real thing is better,it's a huge turn on having his ** in my face as he's ** then watching him tense up as he's ** over my **,now i want to to ** me like ** and give me his **.