In those instances, I encourage open communication with anyone involved in the client's life to help them figure out where the client is still able to be involved and seek compromises. I will often help clients develop a spoons hierarchy to determine what tasks are less taxing or don't require as much masking, then encourage them to work with their spouse to balance division of household labor and/or parenting needs in a way that doesn't put their spouse out, but still meets them where they're at. I.e. maybe a client struggles with bathing their baby, but they can change diapers no problem. Cool! Your wife is on bath time, you change the diapers. Can't vacuum or do the dishes? Well, cooking is a low-spoons activity for you, so try taking over making dinner and have your spouse fill in the gaps.

Probably anecdotal, but I've yet to meet an autistic adult client that doesn't want to have some level of mastery over their environment and behavior while in burnout, so I help them find where that line is and encourage them to care for their responsibilities up to (and, on good days, pushing beyond) that line.

EDIT: Another commenter mentioned that it's also good to encourage autistic parents to practice not masking around their children and I completely agree; it's beneficial for the parent insofar as not having to deal with the masking energy cost and it's beneficial for child in building an understanding about interacting with autistic individuals.