Steam sharing?

I just started phasmaphobia in the steam account of a friend and was amazed that it can be played smoothly and with good graphics. I have a bit of a bad pc and that's why I wanted to ask about who the game is running over her (she has a game laptop there would be no problem to play that) or about me I would like to know if that was on my pc so that I can get it

and sorry for the spelling.

That went through your PC! The other would not be possible just because you were logged into another Steam account.

So that was 100% your pc

: ^)

Thank you so much then I know now.