tell me a comeback for my cousin's taunt

so this cousin of mine is a pure neeech. Both below 25. (for context) khud kuch bolke , she sttarts laughing ...kahegii mujhe hassi aari hai..then laughs within herself for 2 mints. Last time kya hua, context : papa used to do a small business 15 years ago, but he changed it and now in event management, which runs quite well. scene : i was explaining my papa business, to her then she suddenly she started laughing , like "wait na, mujhe boht hassi aari hai", then laughed like fk for next 2-3 mins Me : why u laughing ? she responded "Naani kuch boli thi tumhare papa k baare me" (referring to my papa old work) Me : Kya ? She : rehnedo bura manjaoge (still laughinggg ) Me : are batao toh, nahi manungaa (i nowhere expected it to be like this) She : Naani kehri thi , pheri waale the tumhare papa, cycle pe jhola leke ghumte the Me : Kyaa (she's laughing in betweeen, ) she : wait na, ahaha ahahahahahahahahahahahah me waiting patiently ........ she : rehnedo kuch ar baat karte hain Me ; explained the business and talked about other stuff. \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* Now i realised how cheap she was to say that or behave in that manner, i like my cousin (talking to her), she's nice in her actions, supports me financially sometimes, calls in once in a while for haal -chaal. but at the same time, she and her papa never forgets to throw taunts at us. Now dont tell me to stop talking to my cousin, it will mean , i accepted the beizzati my cousin never does this....she stands and faces if things are bad upon her. so tell me the come back