You know, I’ve never had a mother in law, my wife’s mom passed away before we met, but my wife does dislike my mother. And it seems to me that it’s not overreaction, fear or tradition, but I think there is this part of the maternal instinct that a lot of women simply can’t let go, and they tend to judge the spouses of their children far more harshly than is deserved. Whereas with most people, you tend to encounter, they seem to give you the benefit of the doubt, but there almost seems to be a presumption of guilt that the MIL projects on her child’s spouse. I think also with age comes the presumption that you know better than the younger folks, especially your kids and their contemporaries.
So, I think what happens is a mother truly cares for her child and wants what’s best for that child, and becomes hyper sensitive (so I guess in that way it’s an overreaction on the part of the MIL, not the spouse) to anything they see as an affront to their child. You’re 27 and haven’t given her grandchildren yet…must be your spouse’s fault because your kid can do no wrong. You’re having difficulty making ends meet, well your kid would never waste money, must be the spouse frittering away their hard earned cash. Spouse stays at home to raise the kids….mom didn’t have THAT luxury, and why then if you’re not even working is your house not as clean as mine?
I think the mom’s natural instinct is to make assumptions about their kids’ lives and try to help out and jump in to fix things wherever they can, because a) it’s part of maternal instinct, and b) they did it for 18+ years when you were growing up. But mom is not completely ready to let go of the reigns, and doesn’t quite conceptualize that the vast majority of what goes on in her kids’ lives is none of her business and she will never know about it. She assumes her kids are going to keep in touch with her, let her into their lives at least to the same degree they’d let any stranger in. So, there’s this added element of jealousy and resentment towards the spouse for having usurped her role. And that resentment leads to the presumption that this person has ill intent to your child or is in some way harmful.
The mother is conflicted however as she wants to be supportive of her child, so she tries to accept the spouse, but her anger is steeped below the surface and comes out in passive agressive ways…little digs that perhaps she didn’t mean to say just to be mean, but things she was thinking which came from a place of negativity which she just had to get out, perhaps for her own sanity.
I’ve seen this with my wife and my mother, and it seems universal with our friends as well, everyone seems to complain about their mothers in law, and it’s generally coming down to the fact that she has butted in to things that aren’t her business, insulted the spouse and came off as highly judgmental about things that aren’t any of her damn business in the first place. That of course makes the spouse resent the mother in law even more, and the spouse’s hostility also lurks beneath the surface, which leads the spouse to perhaps try to find biting, passive agressive ways to communicate their anger while still keeping the peace. Neither party fully actualizes that they both want the same thing, yet they both work towards achieving family harmony, but each one sees his/her efforts undermined at every turn. And it’s hard to assume the best intentions on the part of someone who is always judgmental towards you.
That’s what I think, anyway.