ASL sign for: mother in law

The mother of one's spouse.

father in law.

Gloss: MY MOTHER IX1/\ IX-me TRY POINT-ix1 EXPLAIN-ix1 [conjunction] IX1 NOT-LISTEN(colloquial), [interjection].

English equivalent: I tried to get my point across to my mother but she wouldn't listen.

Hmm, no words found now but, hey, it doesn't mean there is no expression for this concept in ASL.