Chloe,
I agree with most of the advice given so far. I have another suggestion to add, assuming it's agreed with openness. Everyone is entitled to some 'me time' whether that is for cross-dressing or more conventional hobbies (yes, I realise that for CDing 'hobby' doesn't cover it). There's no doubt that finding 'me time' gets way more difficult with babies and young children around, and their needs should always come first. However, if that is to the detriment of your well-being, then it will prevent you from being the best parent you can be. If you can have scheduled time for you, time when your wife can do her thing, and time when just the two of you can be together, then for the majority of the time when you are a family together you will be able to focus with all your heart. Hopefully in terms of CDing, a schedule would give you something to look forward to, and quell the urges to sneak.