I feel for ya, man. I guess I got lucky not having a dad to worry about his reaction, and my mom has never forced anything on me (clothes, religion, mannerisms, etc). She Still hasn't quite come around to the trans thing, but I'm working on warming her up to it. I'm talking to her about it more and more now to concrete it in her head, she may as well start thinking of me as her other son. Topics included have been testosterone and effects, and changing my name. In detail. She just listens, which is a step. I hope that your mom and step-dad can come to accept you. Though, you may have to make the hard choice to distance yourself from them as soon as you can, if they cannot. I, for one, know I will not be able to step foot in my house again (due to my homo/transphobic brother that lives here), once I move and start T. We just gotta stay strong, even if others try to bring us down. Good Luck!