Sister in law spends way too much money on herself

This is going to be a bit long, so I’ll make it as short as possible- I can edit if anyone has questions.

My sister in law is a single mom to a 10 year old 8 year old, and a 7 year old. She’s been divorced for like 5 years.

She gets her hair done regularly, Botox, lip fillers, nails always done, her 7 year olds nails are always done in the salon, eye lash extensions, very nice clothes, the kids have nice clothes too.

This is where I get mad. Last Christmas she was telling my husband (her brother) that her boys (10 yr old and 8 yr old) wanted to try out karate, but it was a lot of money, and she didn’t want to pay all that money if it ended up that they didn’t like it. She suggested to him as their Christmas gift if we could pay the 3 month trial. My husband has always been very very generous with her kids.

So we pay the 3 month trial, and it turns out they love it. My sil was upset saying she couldn’t possibly afford the $240 a month membership for both boys. So my husband decided to pay it for a year. It’s now a year later and she asked if we can continue for another 6 months.

So the thing is, I REALLY didn’t care at first like at all. I love my nephews and I’m happy they enjoy the karate, and my husband and I made a lot of money so $240 wasn’t a lot at all.

Until I lost my job. And a few other big expenses- he bought a new truck shortly before that, and we started an extension on our house that we still have to pay for.

So with me out of work, I made a little more than my husband, so our income was cut significantly. We now make less than half of what we did. I am really stressing about money now. My sil knows I lost my job but still hasn’t offered to pay for the karate. I even told her last month I had to stop getting my lip fillers and Botox until I find a new job, hoping she would take a hint.

My husband feels bad for her because she is a single mom, and we’ve had to help her out a few times with bills here and there, she will call my husband every few months and say her phone is going to get shut off bc she can’t pay the bill, she got an oil delivery and can’t afford it, her electricity bill was much higher than she expected, ect. but I know for her to be getting the lip fillers and the Botox she is really can afford the karate . A vile of juvaderm alone is $875. If she was really struggling I wouldn’t mind, and if I was working, I wouldn’t mind either, but I feel kind of like she’s taking advantage of us

Edit- I never said her kids were neglected, her kids are taken care of very, very well. They have everything they want. I am also not judging her for taking care of herself- like I said, I used to also get fillers and Botox but had to stop bc I couldn’t afford it. I think mothers should take care of themselves, but when you are asking other people to pay your bills, maybe reprioritize a little