Do you get mad when someone said that you are short?

ok like this my husband's sisterinlaw doesn't see, to like me because every time when she saw me and she got friend with her she start to open her mouth and said look at her she sooo short, look she so short tiny. I look at her and act like I doesn't care. You know why she do that to me because she is my hubby mom side of cousin that use to like him when I was dating him but he rejected her and I guess she is still jealous of me. She got married to his younger brother. Yeah I am short but I don't care of what she said. what do you do if you were in that situation?