My husband jokes he'll want a paternity test because I'm white and he's Mexican

so my hubby is Mexican and I'm white and Cuban although I look white. my mom is Cuban and always joking she says we (her kids) can have a black baby anytime well my husband always jokes and says he'll want a paternity test of course he's joking I do not take offense to his jokes because 1:I'm completely understanding as to why a man will need 1

2: he's only joking

3: you just never know lol 😂