I (F23) took it upon myself to organise and book a dinner for my partner’s (M23) family to go out for Mother’s Day this Sunday.
As I was the one who organised it all, with little to no input from any of my Partners family, I let his siblings know that we would pay for MILs dinner as our present to her.
My SIL (partners sister) (F26) is angry that I have done this as she was under the impression that we were all going to split it. She thinks I blindsided them all and all the siblings should split it because she can’t afford to get MIL a present. She is the only one who has an issue with it and all of the other siblings don’t mind.
For context, the restaurant we are going to has cheap mains ($20) and my partner has 5 siblings so that means they would all end up only paying approx $3. SIL is always complaining about how broke she is but buys coffees every days, gets her nails done every 3 weeks, and is constantly online shopping or going to the movies.
I feel I’m not in the wrong since I went out of my way to organise this, and this is my partners present to his mother (from both of us).
Am I the asshole for paying for my MILs Mother’s Day dinner with my partner, as our gift to her?
EDIT TO ADD- SIL has a strained relationship with the family. We do a family dinner once a week and she never comes claiming it’s too expensive (we all bring a plate to share) and constantly fights with her parents. She also is in a toxic relationship with an older guy who no one likes, but she is blind in love. She doesn’t put in any effort with her family but expects them to put in all the effort. I have always had a good relationship with SIL so this sort of threw me off as we have never had issues before.
SECOND EDIT TO ADD- I had tried to organise something with them all before booking this, it had been mentioned multiple times previously and I kept asking for suggestions as I wanted to make sure we could securing a booking somewhere before we missed out. There was little to no communication from them and they hadn’t decided anything expect where to eat so I sorted it so we would have something locked in. I didn’t want MIL to miss out since they were being so unorganised.