Mom in law is mostly very loving but sometimes she keeps bringing my skin colour into the conversation

Talking about other factors... and then how xyz is fair ... how people from her part of the country are all very fair skinned. And from my district are darker... in context of my brother in law's future bride, they say her colour is also not fair. Its like mine.
Before I used to feel very weird. But now I got used to it and found it amusing. My husband however felt really bad. Because this has happened a few times now. So he sent her a message telling her not to pass remarks on my skin tone. He likes my skin tone and thats the end of the discussion.
I love that he could draw boundaries and stand up for me.
mil texted back saying it wasnt her intention and if it came out wrong she is sorry. He said "its okay :)" we thought thats the end of the matter but a few hours later my brother in law calls rudely demanding why my husband had to say all that and that she has been crying all day. And then he cut the phone. MIL did not pick up when husband called.
Usually she calls every night. No call from her. No goodmorning text this morning.
Aren't they over reacting???