The japanese Kanji "雌" actually has double meanings, the usual meaning is 'female' but it can also mean 'bitch' or "slut" in a vulgar way. So your gallery title Mesu Haha (雌母) should instead be translated as Bitch Mom / Slutty mom as opposed to "Female Mother".
Actually the title isn't Japanese word but chinese word. '雌母'(Female mom,can be translated as bitch mom) and '慈母'(loving mother,is very often used in article and in old poems)sound the same in chinese