All of you are experiencing life changing events, you with a new baby by c section, your sil planning her wedding, dh feeling torn between his parents, disabled mil whose h left her callously for another woman after decades of marriage, fil who is living it up with ow and can’t understand what all the fuss is about and why can’t he and ow or at least he attend all ‘family gatherings’ as if all is well, since to him all is well. You, dh, and sil are tired of supporting mil so much and want to enjoy life and the exciting chapters i.e. new baby and wedding. After all, mil needs to get over it sometime. Op, you can’t really say you understand because you weren’t disabled or old when it happened to you. You were able to start again and even young enough to have a baby. The lack of empathy from all of you toward mil is very sad. You say you support her but you don’t want to give her the reassurances she actually needs from you all. For instance:
If I were the sil, I’d want my mother to walk me down the aisle. Even if mil is in a wheelchair. I’d want my mother to glide me down the aisle. I’d invite my father only to the wedding, not the ow. And he can sit in the front row but not walk me down the aisle. That is reserved for the parent who didn’t cruelly abandon their spouse, the parent who remained committed to the family and vows made. Your mother I think would be reassured by this arrangement that clearly acknowledged the truth of what happened and genuine support of her. I would no longer be a daddy’s girl if my daddy left my disabled mother for another woman. I think your sil is selfish and uncaring, thinking only of herself.
I can totally see why mil is so worried about being replaced and not feeling supported.
Likewise your dh wants no part of any of this. He just wants it all to go away. As do you. Again, I understand that you want to enjoy your new child, you deserve that. But truly, it would take so little to reassure mil. Sil by doing what I suggested above, and you by not inviting fil to the family gatherings to meet new baby, but invite him over afterward of course without ow. He doesn’t deserve preferential treatment or even equal treatment right now after how he’s behaved. Make sure you tell mil exactly how you’re handling everything so she will be reassured. Why would you want to invite fil first anyway? Be up front with your support. Mil is much more likely to eventually accept what’s happened if she’s fully supported, and I’m sorry, that means putting fil in second place for a while to reflect the terrible thing he has wrought. You’ve had harsher words for mil than for fil. She’s only reacting to the abhorrent thing fil has done to her. And she is upset that everyone is willing to continue on without any overt support of her. She needs to see her d, s, and dil stand up for her clearly in front of fil. Do you understand this?