Bogey, so sorry to hear about your marriage, but hopefully the divorce will be quick and painless.
As for keeping in touch with your stepdaughter, go for it. Unless he's a total ass, I doubt he'll mind if you want to take her to a movie or for ice cream for a few hours.
I am glad to hear that you're happier now that you have been, and wish you all the best. It's good to hear from you.