For context, PILs hate me. I'll never be the mother of his children, can't even remember my DCs names, despite being together 6 years. Exw is very bitter, cut contact with PILs when I got together with DH. DSC were fine with us being together until divorce came through. Exw had promised them DH would come back to her. Since divorce, DSC have had no contact with DH, even when he was seriously ill in hospital.
He's been a bit off for the last couple of days and just blurted out that exw and SDCs are spending Xmas with his parents.
AIBU to stop making an effort? DSC are adults, my DC are kids.