For me most of us, we have to navigate the issue of in-laws. This can become a thorny issue. Basic rule….swap parents. His become hers, and hers become his. Remind each other of their needs, times to send sustenance and times to send them to the doctors if necessary. Remember to send enough money for prescriptions.
No parents are more important than the others. Furthermore, if one set of parents is no more, it’s not an excuse to neglect those who are still alive because yours are no more. Read Dr. Tad’s book “YOUR MARRIAGE… HEAVEN OR HELL ON EARTH?”. There is a whole chapter dedicated to dealing with parents. Always remember, your in-laws produced this beautiful being you call “bae”, “love”, “babe” or whatever you call each other these days!