Personally I don't think your a bad wife or person after all you didn't sign up for this same was as my wife didn't.. I wouldn't blame any wife from divorcing their husband in a heart beat.. so you need to think this one out and do what's best for you and your child and your family if you decide to go that route..
I'm lucky my wife accepted and loves me as her husband and doesn't really want to know about my crossdressing.. A blind eye thing..