>>151056133
It's pretty obvious no?

The two simply bonded overtime think about it, the exterminations are both their jobs and entertainment for them and couple that with the fact that she's his right hand, his second in command, they probably spent a lot of time together

And they match eachother's vibe and energy, she probably laughs at some dark humour too, I mean shit who wouldn't get attached? And we're even ignoring the natural and biological attraction here(male and female) it's just that simple I think. They simply had time with eachother