Arguing with me over the fact I told him not to bring up my sister

I told this man politely the first time not to bring up my sister and he throws a hissy fit. I’m so serious the reason why I don’t feel comfortable with him doing it because he has actually made sexual jokes about somebody I used to live with and my mom as well I tried to nip it in the bud quickly. Idk I don’t even think I’m being as emotional as he is idk , I jus hate it because he sparked a reaction over something that could’ve been a simple ok I understand you know