Me and my fiance have been together for 6 years. I have boy/girl twins who are 17 turning 18 next week and he has two kids. A daughter that is 30 and a son that's 28. I have never gotten along with either of his kids. His daughter very ablest and my twins both have autism. His son was always weird to me and I could never put my finger on it. Now I know why. One of his son's friends brought it to my attention about his son's drawings. I always knew my fiances son liked to draw and even if I had weird feelings about him I always got him art related stuff when it was his birthday. The drawing he had drawn though was a cartoon of my twins having sex with each other and in the group chat he sent it to he said "Autism Speaks". I was pissed and my fiance doesn't see at as any big deal. I told him he's sexualizing my son and daughter and their autism. He said they aren't kids. They're almost legal adults and 17 is age of consent and autistic people can consent to sex. I told him it's with EACH other. His argument for that is that step mom porn or whatever is the most popular porn on pornhub. I feel that's completely different. Especially since I'm sure the consumer of said porn knows they aren't actually related and my children AREN'T PORN STARS! He is defending his son so hard here and it's pissing me off