This is not a DIL issue, this is a "you are married to a spineless @#@##@ issue". Unless you live in a country where women are subjugated by law, but I am guessing that you do not since you are on DCUM. They you are responsible for your situation.
Who cares about your ILs expectations you are not married to them. My MIL would never be so bold as to make a any demands on my role as wife, mother, career person. The few times that she tried (insisting that I personally bathe my 6yo or suggesting that I supplementing with formula), I calmly explained to her that I would not be taking her advice and that was the end of that argument.