Wowza! OP I am fuming for you. Just imagine for a sec a MIL came on here and said I routinely exclude my DIL and GC by asking my son to take me out to a restaurant and pay for me at least once every other week sometimes as often as once a week and for him to leave his wife and child to do so. Then I not only demand to be invited on my son's immediate family vacation with his wife and child using manipulative guilt tactics to get my way by saying I could die any day when I am a perfectly healthy 67 year old with no health issues. Then I demand my son and DIL cover the whole vacation then I ask my son not to invite my DIL and GC out to dinner one night even though my DIL was gracious enough to allow me to come on her family vacation and pay for me. So she is good enough to pay for me but not good enough to join me for dinner despite that originally this was her vacation. OP you are a literal saint for putting up with this and allowing this to go on because this dynamic between your DH and MIL would have sent me through the roof a long time ago.
I can't imagine a father requesting this of his grown married daughter with a child of her own.
The dynamic you describe between MIL and DH I see play out a lot between mothers who are widowed or divorced or single. They rely on their sons usually on a subconscious level to fill that role for them. It's sad that your MIL is lonely and a widow and absolutely your DH should visit her and call her and pay attention to her but from the sounds of it it seems like DH is enabling this codependency with his mother and it would be a major turn off for me. So honestly good for you for putting up with this for so long because it wouldn't be me.
When your husband routinely leaves his wife and children out of an activity that should be family time (dinner time) he is enabling his mother's rude behavior by excluding you as his wife and children. And he is paying for all of his mother's meals that's acceptable unacceptable considering as you mention she works and has money and the reason she sometimes doesn't is that she was irresponsible with it. You are married so yes his money is yours and vice versa so he is spending your money without inviting you.
It's more normal say if his mother's house is on his way home from work and he stopped in for a quick meal and maybe took some home to you and your child but no he is taking time out 1/7 or 1/14 days taking his mom out to a restaurant and not even inviting you.
I'm not saying you can never see your child alone but you might ask that a few times a year for them to stop by the house or to meet for a coffee or lunch that's one thing. But there is a huuuuge difference between a once in a great while a request to see your son alone and between having a standing invite for dinner at a restaurant with your adult married son who has a child of his own. Most families use dinner time as a time to catch up with their wife and child so dinner invites to a restaurant should include the rest of the family the DIL and GC.
Routinely making dinner reservations at a restaurant is something you would do with a romantic partner like if your MIL had a BF not with her married son. That is BF behavior and that's why I said she is treating your husband as a sonsband. A fill in husband or BF.
Jesus. Does he even take you out as his own wife that often. Something tells me he doesn't He should be doing these things for you. Booking a restaurant reservation for his wife and child and having a standing family night with them. Not his mother. It is definitely giving mommy's boy vibes or like the umbilical cord hasn't been cut.
If my husband was doing this for his mother every other week and not as often for me as his own wife I would be living and I would be having a talk with my husband about how I expect to come first. So say he is taking his mother out to eat once a week I hope he is taking you and your child out twice a week. Otherwise that's super weird to be treating his mother more often than his wife.
It sounds like your husband maybe needs to find some activities in the neighborhood where your MIL can branch out and meet some nice friends or sign her up for a dating website to meet a man who can do those things for her instead of her son who has a family of his own.
I would not be happy at all if my husband was routinely scheduling dinners with his mom where our child and I was routinely excluded from leaving me to do all the child rearing one night a week and missing out on dinner with my husband not to mention my child missing out on that family bonding time with their faither.
I think you need to have a CJT with your husband and reach a compromise on this like maybe once a month or every other month he treats MIL to lunch just him and her. She still gets her alone time with him but it's not constantly leaving you out. Yes I think it should be lunch because dinner time is family time and something families should be invited together for. Stick to lunch.
I definitely would tell my husband no more ROUTINELY leaving out his own wife and child from dinners out to eat so he can essentially fill in for the role of romantic partner for his mother. It's weird! I would also tell my DH that dinner time is time to bond for us as an immediate family with his wife and child since our schedules are so busy during the day that is precious time for us. I want my DH present in our child's life. This would be non negotiable for me. Lunch here and there just the 2 of them is fine but not dinners out to restaurants where I am constantly excluded from.
How he responds to what you have to say will tell him if he really values your marriage and his relationship with his and your child.
Someone on here said that the parent child bond even into adulthood is stronger and more important than the marriage bond and sorry I wholeheartedly disagree with that. Yes your parents will always remain an important part of your life but when you marry you are vowing to put your spouse first and front and center. That now become your immediate family. You are entering a new chapter of your life. The person you build a family with, come home to everyday, and share a literal home and bed with, not to mention a literal life with to me is the strongest bond. You as his wife and your feelings should absolutely come before his mother.
I as a self respecting woman would never ever marry a man who put me second to his mother all the time and didn't listen to my feelings. I expect if I am good enough to marry I expect to be put first.