Should I talk to my brother about his wife?

My mom and my SIL do not get along. Honestly my mom doesn't like anyone my brother has ever dated. She hates his wife and I will be honest, she has taken things too far several times. She has said and done shitty things towards her, especially when they lost their first baby. She's very much nobody is good enough for my brother. She was so upset when he got married. When I got married she was excited and pay for my whole wedding. While I definitely think my mom showed some favoritism, she wasn't mean to me and we have a good relationship. My brother recently went no contact with my mom because my mom baptized their baby. That's a long story. My SIL is not religious and was very upset at her and my mom told my SIL she's trying to save her granddaughter from hell because her son married a no good whore who will never be good enough for her "baby boy". So they have not been talking. My mom is convinced he's going to come back and apologize because that's her baby boy. I just say "Ok mom." Well my mom is upset because she found my SILs tiktok and the tiktoks are quite weird and gross. In one she's in a slutty outfit grinding on my brother and the caption said "When she wants to ride her own son's dick but you do it better." Another one she's sitting on top of him while dancing saying "Sorry mommy. I know you wish this was you." Just insinuating my wants to fuck her own son.. Another she's twirling her hair to Sabrina Carpenter and saying on the screen "Boy moms. Just leave the poor girl alone and go make out with your sons." I understand maybe I don't understand her pain. I mean my husband's mom was abusive so I've never met her. But this seems petty and end of the day shes upsetting her husband's mother. My brother could divorce his wife. Our mom will always be his mom. My husband doesn't think I should reach out but I think he needs to know the stress this is causing our mother.

Edit: I'm not saying what my mom did was right but it's a little misogynistic that nobody says this about fathers. A father can literally threaten a daughter's boyfriend or husband and pull guns on teenagers and do extreme stuff and nobody bats an eye. But my mom says some weirds that hurt feelings and people go crazy. How come men are allowed to be crazy and possessive of their daughters and that's fine but if mothers do it to their sons they want to have sex with their sons? Maybe you all simply think boys don't deserve that type of love and protection.