Do not make the decision about moving or not moving at this time. Do not make any major decisions while you're emotionally distressed. Do not make any decisions based on what that message from was about...it was nothing but horse puckey being said by someone that is only looking out for his own happiness at this time (and he probably doesn't have a clue what would/will make him happy)
There may come a day that you feel that you and your family need the support and even-keel life that you might have if you moved back to your family. Certainly kids can benefit from an environment that is sound, less stressful, and more routine..but that is something that can be decided down the road..by YOU, not by the WAS.
I fully understand your commitment to standing for your marriage. Just remember that standing doesn't mean standing still...you'll still have to make decisions down the road that are for YOUR benefit and for your kid(s). You will have separate yourself from the emotional side, and conduct some decisions in a business like way. Just make sure you are making decisions when you are not being overly emotional from what you will be struggling with in the relationship.
Your children will see the strength you gain as you go through this time in your life. You can't protect them from everything, unfortunately, but you can show them the strength that comes from faith. And that's the most important lesson you can show them through example.
Women are angels. And when someone breaks our wings, we simply continue to fly...on a broomstick. We are flexible