I Have a Question

How should i respond to my father who is asking me if i still want a relationship with him? (he was a pretty bad father figure my stepdad is a much more respectable person. He perceives me and my brothers as a work force for his projects. He is two faced as he trys to be nice and wants us the kids then lashes out at everyone else, and he attempts to guilt trip me into feeling bad for him so i give him the answers he desires.) (manipulative)