OMG, what a woman. That is what I said, she rather live

with her kids, and have different BFs, then let your 小叔子 has the custody right for his kid. If your 小叔子 has a decent income, that woman has right to ask for child support.

There is no way the woman would let the guy's wife to take care her kid, unless, she can be proved that she is a unfit mother