Bear with me, it's a long one, I'll try to keep it brief, but apologies for any dripfeed. And I think this is more of a rant, anyway.
DSister has 2 DC, Dniece turning 15 next month and Nephew just turned 12. DBIL comes from a family where his DF is a bit of a chauvinistic and overbearing character. When the DC were small, the money was tight and they both worked every hour possible, so every Saturday one parent would take the DC swimming and the other would clean up. DBIL was actually rather good at it, to the point where, if you're still in swimming circles, you're likely to know his name. However, 2.5 years ago DSis had health issues that took her out of it. Dniece seemed to be following in her father's footsteps.
When Dnephew turned 11, Dsis's FIL (rather wealthy himself and doting on Dnephew, but Dnephew only) bought him a season ticket for a Premier league club. Dniece for the same birthday got a book. As Dnephew can't go alone (SEN and very young for his age), Dbil has to go with him. Neither Dsil nor Dbil could stand up to Dfil to stop it (and they were a bit blindsided, tbh) and now, to afford Dbil going, all expenses had to be severely trimmed down and swimming went through the window.
Now DBIL and DNephew spend weekends at the football, DSis does the housekeeping and Dniece is left to her own devices.
I've been talking to the Dniece a lot about it, and she's hurt by her DGF'S behaviour, but doesn't want to cause hurt for her parents. She is quite smart, in top set, and set on going into my old field, psychology. Unfortunately, her one sore point in school is maths, which she needs on quite a high level (says 6, but realistically 7 due to high demand) in local 6th form Psychology A levels, so she hoped for some tutoring in GCSE years, but now this isn't possible. So I talked to my Dsis, offering to pay for tutoring myself, but Dsis couldn't accept that. We settled on Dniece babysitting for me on Saturdays and I would pay the tutor in lieu (don't worry, Dniece will get "tips" too).
All seemed settled, until DFIL found out and WW3 erupted. Apparently, how dare I pay for Dnieces tutoring when Dnephew is SEN, but apparently still better investment uni-wise (I love my Dnephew and he's a lovely boy, but even his parents acknowledge uni may not be the right path with his level of SEN. Things may still change, though).
So now I'm the bad guy, DBIL and DSIL are under barrage, and DFIL keeps demanding my contact details. Apparently, "he is willing to compromise if I pay for DNephew's tutoring, too". I am willing to compromise by refraining to go over to his and giving him an earful. I am sticking with my DNiece, but my DBIL and DSIL keep going on re: the position this puts them in.
Anyway, I'm exasperated. There are several family birthdays coming where confrontation is likely. Any advice on how not to end up with birthday cake up anyone's nose would be deeply appreciated.
And breathe...