I’m a believer that you should fast around your life instead of living around your fast; the more organically it meshes with what’s important the better the chances it will work long term.
It could be that OMAD is the most sensible thing you could do for now. All you need to do is skip breakfast and you are Scott free until you get back from work and ready to eat. You also need to talk to your kids, they need to learn boundaries anyways and it is not unreasonable that they don’t come to you for food and in fact keep their snacking away from you. You could even ask for a personal evening a week to be left mostly undisturbed, then return the favor to your wife on a different day of the week.
Also cardio is a fast multiplier; the sooner you empty your glucose reserves the faster your fast benefits kick in.
It’s like anything else, it just takes practice to cook and not eat. When I’m fasting, I still have “meals” with my kids, I just drink water. Plus, you’re setting a good example of self-control and delayed gratification for them.