Oh Red Rose,
What do I say about this...? When you are a Grandparent, you do feel extra sensitive to the grandchild....you just do. All these rules, my Lord! Why we have these feelings, I don't know but have them we do. Reprimanding your Mother and the Grandmother of your kids! Please. One of the few people outside yourself who loves them unconditionallly.
Interfering? Oh brother, I guess if that's her rule, then we have to abide by it. It's her rule too, the son just goes along with his wife. Good Lord.
My Grandfather used to come by my house every day. So did DH's Dad. My Grandfather, God love him, would bring sticky donuts each time from the Donut Palace in the town where we lived. I guess I could have gotten really mad about that because there was donut residue everywhere. I would have died 10 times if I had reprimanded that sweet man now that he's gone! Never! It's not worth it. He loved them!
And DH'd Dad? About every 3 days he would come by to take the kids for a ride. We did not have seatbelts then....I'm glad nothing happened now that I know about car seats and seatbelts~! Would I deprive that sweet man of taking them out? No, not on your life. It was precious to me.
I don't understand what has happened to people. I really don't. You get a new person though, in your family and it's hardly ever pretty. We only get the leftovers when it's a DIL, many times.
I know there are good DILs out there....I simply have not personally met any. I think there is at least one on this board, though.