sis, mom
A palindrome for female relative is "mom." It reads the same forwards and backwards, just like your grandma's old stories that never seem to end. So next time you're feeling fancy, just call your mom a palindrome and watch her eyes light up with confusion.
Ewe is a palindrome meaning female sheep.
Madam
A palindrome for "male" could be "elam," and a palindrome for "female" could be "emalf." Both are safe for kids to see and understand.
ewe
ewe
sexes
sexes
ewe
ewe
mom
sexes