Thank you for sharing, and, yes, this is very much our experience as well. We're not unhappy at all when we're home, much like you.
My in-laws are much the same. Thankfully my wife understands them and early on said we could never trust them to tell the truth about taking the precautions we wanted them to if they wanted to come over and see the kids. It took a while for the info my wife was giving them to make any dent, but, sure enough, my MIL is always telling my wife now that my FIL is out all the time, only sometimes masked, with the rest of their family and she now masks in her own home.
I honestly gave up giving the people I know more info, but I hope yours gets through to your family!