Jason,
As a heterosexual coming from a family that sounds eerily similar to yours, Kudos. Damn that had to be tough.
Hey, your mom's response was anything but judgmental or condescending. Moms are just great. I bet that she didn't bring it up when you saw her simply because it is potentially uncomfortable and she was elated to see her son, who she loves, without causing you any discomfort or grief.
IMO, all will work out well for you. I'm with you on the email, in many instances you [anyone] can express your [their] thoughts on paper much better than in dialogue.
You took a major step, courageously, and no longer need to be burdened with that decision.
I have some similarities to your prior dilemma...mine are of the 'getting into big trouble' orientation, but I have experienced (possibly) some similar family challenges.