Well, this is such a sad situation. As much as possible, we always want to live harmoniously especially with our parents. But since you are already in this circumstance where living with your mom already became a problem rather than a help, well, I agree that to move out is the best way. Besides, your kid is already big enough, so you can actually do more things. Why dont't you try living alone, with just your immediate family? Living with mother-in-law would be much more complicated, in my case, as compromising is the number 1 key to work things out. But for experience's sake, you may also do so. Just be prepared. Good thing you started this thread as this will help you to make a sound decision.