Season 2: About Last Night

Catherine gets very upset. Why? Vincent didn’t even beast out! Catherine
tells him that she had it  “under her
And…  I think that  this was at the core of everything. Quoting
Vincent S1 ep 15: “I’ve never felt so out of control than when I do when
I’m with you.”
So Catherine desire to be
“in control”, she probably never felt more “out of control” than how she did when she was with Vincent.