Being a bitch?

Here we go again. I'm really trying to go about this in a way that I'm not being a bitch but I'm having a tough time with it.

So recently my sister in law has left her husband and has decided to be in a relationship with a woman. *disclaimer * I am very for LGBTQ. My own brother is gay. So it has nothing to do with that on my end.

She has 2 sons ages 16 and 13 who absolutely do not approve. The 13 year old has been in another state with the ex husband and the 16 year old has been here with her. Well last week she decided to move in with this woman. The woman has a room for the boys. We live about a mile from her. The 16 year old hasn't left our house. I don't mind having him here like on weekends...but I mean, he doesnt live here.

He's been here for the past 2 weeks. We have fed him, done his laundry etc. I told my husband to ask his mom (husband's sisters) for some money for groceries. She has thrown an ever loving fit about it. Gave him 30 dollars for groceries and whatever. I'm like...ok...but what about the 2 weeks prior. We have been on a very tight budget since the quarantine. I'm an essential worker, husband was not and he was the breadwinner.

She is just living her best life while not having her kids, and not paying for them so to speak. Plus...I have zero family time with my own family. I haven't been able to get comfortable in my own home meaning no bra etc. he's sleeping on the couch, basically made my living room his bedroom. Hes a good kid and he isnt the problem, but he needs to go with his mom or she needs to figure something out. I don't want to hurt feelings but any way I go about it, I sound like an asshole.