"Do you think its harder for mums of boys when they become mils than mums of girls?"
Not necessarily.
I think a lot of MILs don´t realise that their relationship with their son isn´t changed by the DIL-it has already changed.
plus DIL isn´t the "other woman" you don´t need to compete.
She doesn´t want to be his mother
I think things change when there are children as DIL is often the one arranging childcare/babysitting/visits so probably asks her own mum first.
My MIL is her own worst enemy tbh.
When we used to visit parents at a weekend, we stayed with mine-ILs house not big enough.
So, if we went out the children were left with my parents.
ILs would never visit-they always wanted to see the children at their house.
Also, they would never visit the children & I in the week-it had to be a weekend so that they could also see their son for the whole day.
Now I do get that, but if they had visited in a week, my husband would have seen them for a couple of hours when he got in from work-but that wasn´t enough for them.
So, they´d rather miss out on their only GC as well.
They were always a bit all or nothing.
And since we´ve been abroad, they haven´t visited at all.
Even declined Christmas!!!!
(And yes, my husband would have been there the whole time!)