Is it normal that my step sister still makes me give oral

Yeah, adults don't say "eat her out for sex".

If you are grown, you should have the strength to fight back. If you are not fighting back, you are a sick fuck that enjoys it.

I call troll/fantasy. Although people have called it on me when it was totally true... Naw, u get no benefit of the doubt, sorry.

Few people stick with their childhood hobbies.

It sounds like she's taking advantage of u, and ur letting her. Stop it, be a man and tell her that she is ur sister and or u don't want to screw her anymore. There, done. If u are simply attracted sexually to eachother than blame mother nature, (cuz ur not blood related) or u COULD get some concealing, now if u both develop feeling for eachother than again, blame mother nature, and move to alabama 0.0

WHAAAAAAAAAAATTTTTT????? That is not normal!! You need to stop doing that. I think you both should get some counseling.

That's not normal people!!