I'm interested to hear the psychology behind two things that are mentioned semi-regularly. If you can shed any light on the what and why, I'd like to hear it.
1 MIL seems to get on with DIL well and have a good relationship until DIL becomes pregnant, then MIL (and possibly also SIL) are unkind and even cruel to DIL.
(in my case, unmarried so not-really-MIL)
2 MIL has an odd relationship with GC. Seemingly normal GP to the outside world, but actually not really interested. Meanwhile MIL very excited at the prospect of her daughter (not pregnant, no kids) having children. In my case, this is the only GC that MIL has. (The first time she saw her GC she declared the baby was already spoiled as he quietened on being held or fed.)
3 As well as MIL changing her behaviour to DIL on pregnancy, and actions speaking louder than words on new GC, I'll throw in- I'm now a single parent as ex-P has a blind spot about his mum and even when he agreed her behaviour was unfair, he expected me to "play nice" and rise above it. He ignores these things and hopes they go away.
Thanks