My cousin-in-law insulted me (slut shamed me) at my cousin’s house six months ago, I have been invited to their house again - am I wrong or being petty to decline the invitation?

I will call myself Tiffany to protect my identity (not my real name)

In September I was invited, along with mutual friends, to my cousin’s house. She lives there with her husband and she had just given birth. Halfway through the visit, there was a discussion about how we (as the eldest children in our family) have started having children now. My friend said: “Well, Tiffany hasn’t had any children yet.” To which her husband retorted, “not that we know of”. I was so uncomfortable that I was lost for words. I’ve only had one relationship several years ago and it wasn’t sexual so this was really disturbing. My friend then asked uncomfortably, “do you have any children we don’t know of Tiffany?” And I said “most certainly not.” We exchanged gifts shortly after this exchange and left.

Everyone pretended that it was a joke when I asked two friends about it. They initially pretended they didn’t remember it happening. One of them later admitted it was an asshole move and that she told her husband, who also agreed it was in bad taste. My mother, sister and aunt have advised me never to go back there again. I told the friend who said her husband agreed that it was in bad taste that I would be declining the invitation and she said “just brush it under the carpet - you can’t hold grudges in life.” Only this isn’t holding grudges. It’s having dignity. I won’t let them take that away from me. The man insinuated that I have hidden children or that I’ve had abortions in an attempt to reduce and diminish my self-worth and dignity. He made me extremely uncomfortable.

How on earth can that be passed off as a joke? I felt like they all gaslit me into accepting it as a joke. Only, I am not close to this cousin-in-law so it’s not a friendly joke. Also, he’s extremely religious so it doesn’t befit him or his personality to be making such a crude joke. I have never had abortions, but even if I had - that would be my personal business, and what is it to him?! As a married man and father-of-one, it’s extremely inappropriate of him to state.

Edit: Many people are approaching this from a secular lens. I am a very secular person, which automatically makes Orthodox Muslims view me in a negative lens. They are so religious that they all observe very strict Islamic dress code. They are so religious that my absent father who never contacts me, contacted me to tell me to make sure I cover my hair if I am to attend the naming ceremony of my cousin’s daughter - which I didn’t attend, because I don’t conform. They already see me as a rebel. My father has never told me to cover my hair. It’s only because my cousin’s husband is from a VERY orthodox family. This kind of joke is not normal in context of the culture he belongs to. You don’t joke like that - especially not with members of the opposite sex. ESPECIALLY not with your wife’s cousins.