NC for this. DP has a milestone bday in 6 weeks. He has ongoing mental health issues. Mil has no interest in supporting him, despite my regular pleas for help.
She is in complete denial and blames me for his issues, despite them starting years before we met.
My Aibu is: our DCs have planned out DPs bday from morning to night. Intricate detail because they know DP needs this.
Just read on FB that SIL is planning on coming home for DPs bday and MIL has commented that she's looking forward to family being together for the weekend.
DCs are not DPs children. MIL has never showed an interest in them. No one has mentioned anything to me or DP about wanting to spend time with him over his bday. He has seen sil once in 4 years.
Do I
a) alter plans due to a fb thread I wasn't actually included in
b) pretend I haven't seen it and let dcs carry on their plans w the chance MIL and SIL may spoil it
c) call them now and tell them to back off as plans are set