I am unusually sympathetic to parents in "coming out" scenarios. Be patient. Give your dad time to get used to the idea.
Just remember that your parents probably still think of you as a little kid, like when you were 8 years old, when you had a big gap-toothed smile, when you were their "pride and joy" etc.
But as soon as they find out you're gay, your dad's first mental image was probably of you getting nailed by a leather daddy.
So maybe understand you can see why he reacted emotionally :tongue:
It took several years for my parents to come around. On one hand, it strained our relationship because they did not like my being gay. On the other hand, our relationship improved quickly (because I was no longer hiding from them, and no longer scared of their reaction).
Eventually, my parents came to accept me. I have heard the same kind of story from many, many other guys. Statistically speaking, your dad is likely to accept you too. It will just take some time.
This whole post seems pretty dead-on, but the bolded part may be where the disgust comes from. It can hit a dad pretty hard to think of his son with another man.
For a parent, finding out that your child is gay, may mean killing off the hopes and dreams you had for that child. For some parents this is far more serious than for others. The fact that your step-mom is supportive is a really positive thing - she'll be in your corner, talking to your dad, trying to help him understand.
You did the right thing. It's done now, Cath, and good for you! I'm so proud of you. I know it was hard and that it hurt. But now you can lead an honest life and be completely yourself. All I can say again, is, I'm proud!!!!