Lo-Fi Games

I used my mother's account to buy the game, but I still have the information, order number, key, etc. How do I get a steam key for it? please tell me

Edit: it was a long time ago when I bought it, July 3rd to be exact

you can use your key you allready have to activate it on Steam.

ok hold on I will try this

Edit: THANK YOU SO MUCH I <3 YOU