How can I ask my parents?

So I have wanted to buy / play a game for my Ps4 for a long time and I wanted to ask because the game is not approved for my age as I can ask my parents if I can play it is fsk18 I have already asked my father and i may but i still have to ask my mother so how can i best ask her

Straight out.

Just ask and hope that there's a yes and what game is it about

Gta5