If her spells misfire their intent and somehow help him out, I... You betcha. I am all for her absolutely messing things up and speeding up the unleashing of Hell. Vanessa Ives was born to do that.

"Proposals", see, it is just a love letter from Vanessa to Rathakku... Not everyone swiped left.

Through compulsion she would be able to feel what the creatures feel, so she'd know if the love bites worked (or in this case didn't work well enough).