Didn't May save his life before?
Still it seems to go for sex proposition again, well maybe he will torture her for a while with it and seeing May strong resolve not to do it, he will help her for old times, if he has any good in himself, and if he doesn't like his uncle or that evil shortie.
Or again it's just a test, after all Moss will tell May there's Bern life on the line, that they don't need her and she can be killed and will put even bigger pressure on May.
I'm still quite annoyed we don't see Bern at all from time May wake up