How old are her kids? I know you said you aren’t mingling but if any of your kids are old enough and healthy, could they babysit on the weekends? Do driving to practices and activities for the mom? If you have a cleaning lady you like, could you pay her to clean their house? Or if they have a cleaning lady they like pay her a bit extra to do their laundry? Help with cleaning the parents’ house? Maybe send an email to the husband pointing out how much his wife is struggling. Sometimes men are so blind to that sort of thing. They just need to be told to help. Both my dad and Dh are very willing to help and take care of things they just don’t think of it. They need to be told what to do.
What about organizing a mealtrain with friends? Maybe one that lasts a few weeks. Knowing your meals are covered for a month is a huge load off the mind. A meal brought every other day or every 2 days makes a big difference.
" I object to violence because when it appears to do good, the good is only temporary; the evil it does is permanent." Mahatma Gandhi
"This is the ultimate weakness of violence: It multiplies evil and violence in the universe. It doesn't solve any problems." Martin Luther King, Jr.