Logically, it cannot be concluded, that just because Man City won in the first leg, they will have an easy game in the second leg.
PSG will do everything to try to win the match. If you manage to score a goal early, and don't slow down, you have a lot of chances to surprise.
Personally, I think Man City will pass, but he won't have an easy life.
Yes,,, this is the conclusion of most sane people including you and me;) Both teams will fight, both have everything to win both want to taste the glory of Champions League for the first time.
I think they will throw everything they have in this one. But my bet is on PSG!