MIL is always defending mothers who show favouritism towards one child

I am just curious to know if someone else has similar experiences.

Now, my MIL loves her daughter.
My husband…not so much. You can see my previous posts about it if you want.

Just an example (but I could come up with many many more), she gifted my SIL’s family with an heirloom of the value of at least 10000 euros, and she gave my husband in the same occasion an “heirloom” that might have a value of about 100 euros.

Of course she keeps saying that she is fair towards her children.

Over the last year or so, it feels almost like she wants to have an argument with my husband.
When she speaks with dh on the phone, she systematically finds example of mothers who display favouritism towards one of their children and tell dh, of course she is on the side of those mothers.

Lately she has been talking often about this relative whose bank account has been drained by one of her children.
She has given him her car, paid his mortgage, everything over the last 15 years or so.

Meanwhile he spent her money on gambling and shit. He did not even bother finding a job for a long time, as mummy was financing him and his family.

The other son was a bit pissed off about it and there were arguments in the family.

And of course, according to MIL: it’s the non leech son’s wife fault if there were arguments.
The mother was simply helping her son and “the stranger ” (meaning DIL) ruined the relationship between the brothers.

My husband simply said that this aunt should stop financing the leech, and that if time after time she keeps giving him money, she is going to carry on creating issues.

MIL was enraged as this is simply “a mother helping her son”.
She has done it other times, about other people, and the few times I see her, she tells this stuff to me as well;
It’s like she wants to get a reaction from us, and she gets pissed off as we are very aloof about these situations. It’s almost laughable, as she gets very frustrated about it, and we don’t.

I wonder if she comes up with these examples because she wants to convince us (or maybe herself) that her behaviour is normal, or if she wants to ignite the fire for an argument with us.
Do your MILs come up with similar stuff?