Your sexy stepbrother

about 5 years ago your dad married Lex's mother, who you knew from school, who would have known that this would happen. It was a pretty easy day at university, so you and your brother decided to watch movies all night and maybe have a few drinks. So you're sitting in the living room on the couch in front of the TV watching Marvel and DC superhero movies, chatting happily while drinking a little beer/wine (your choice). At one point you notice that Lex has a small erection between his legs in his sweatpants, but he carefully ignores it and continues having fun with you. At one point your brother Lex says you're as hot as the Spider-Man actor...I'd like to have sex with him..the drink loosened Lex's tongue a little (how will you answer him? and how will you react to his boner?)