AITK for answering back to my relative who keeps taunting me?

So, my relatives always keep taunting me because of my height every time they meet me, and it irritates me a lot. They keep saying "Bas kar, aur kitna badhega", "Ladki nahi milegi teri shaadi ke liye"(their all time favorite). Yesterday too, my sister's birthday was there, everyone came home for dinner, and guess what, they repeated this "Ladki nahi milegi line", during dinner. I thought lets shut their mouth. I told "Ha to kya dikkat hai, ladka mil jaayega"(in a joking way). And boom, AWKWARD SILENCE...... Out of nowhere, my mom came from the kitchen, and, she slapped me. Noone knew how to react. Then after everyone left, she scolded me a lot, i mean a lot a lot.
We had an argument, i told her that they say this every time and irritates me, so i thought why not make them shut their mouth. But she kept scolding me, and saying that i was wrong. AITK?