MIL accused me of being in an affair

I’m 20F living with my in-laws. Our family once invited my SIL and her husband for dinner, everyone sat down and I happened to sit infront of SIL’s Husband. Nobody thought much of it, just went on about our day. A few days later SIL called MIL saying that her husband started talking ill about me, saying ‘her DIL doesn’t have any sense of decency, she came and sat infront of me in dinner’ to which my MIL told me to not to come out when he visits next time onwards and I agreed. (Wasn’t really a fan of greeting him anyway)

Timeskip to their next visit, I didn’t come out as I was told, but wanted to meet SIL cuz it’s been many days since she last visited, I asked my Husband 28M about it and he said I can go, I told him MIL said not to come out in front of her husband to which my husband said that I can just greet him and go sit with SIL. I still wasn’t very confident about it so I told him to ask MIL first. She agreed. I went and greeted him (with my husband) and my SIL was sitting in a room so I went to her.

Day passed. It was a weekend so my husband was out with his friends at night around 11pm. I was in my room scrolling when suddenly MIL came in with another SIL (I have 3 SILs, one is married and this one was 2nd SIL), She seemed angry and I didn’t know why until she started talking.

She said ‘I already told you not to come out when SIL’s husband is here but you still came out, I know you have bad intentions(???), I have seen how you look at him and how you get ready whenever he visits(????) Today you stood for a long time infront of him trying to attract him(!!!???). My son is not enough for you? My son is such a sweet innocent boy and you still look at other men?’ I was flabbergasted, still trying to process what she was saying, I looked over at my SIL hoping she would defend me but she just sat there without saying a word. I told her that I already asked you if I can come out and you said yes, to which she said ‘leave all that’ in a frustrated tone. ‘You’re ruining my daughter’s marriage! One day you will surely get caught talking to her husband. Go tell about this to your parents or to your husband I don’t care.’ And she left. I didn’t get a chance to defend myself or more like didn’t even know what to say, like this was NEXT LEVEL.

Me?? With him??? Are you for real?? Like, I don’t even know him personally I don’t even bother to look at him, I love my husband wholeheartedly, why would I want other people?

Well this is all in the past almost 1 year ago. I still live with my in-laws though… My husband and my FIL took my side and defended me. The next day there was a big fight, my husband argued with MIL and my FIL was as surprised as me saying how and what even made her think like that. They had a big argument, almost went physical.

In the end MIL said ‘it all came out in ager I didn’t really mean that’ and apologized. SIL didn’t apologize yet though. Tell you what, she was dropping in some comments about me mid-argument as well, things like ‘you put on make up as soon as he comes home (to be clear it was a coincidence, and it wasn’t even make up it was just eyeliner, I put it on and they came), you kept on asking whether he was still here or not when he visited last time (the reason was I wanted to know when he would leave and when I would finally roam around like normal).

That’s it. Even though she apologized it still hurts me a little bit, I didn’t say anything to my parents cuz I didn’t want to make a big deal out of this.