"Ptá se naší matky."

Translation: He is asking our mother.

[katraylor]

Can this also mean "He is asking our mothers," or would that be written differently?

[VladaFu]

plural would be "Ptá se našich matek."

[BossKaiden]

How do you know that it is "he"? Could it also be "she"?

[VladaFu]

It could be any gender.