She wanted him to help repair the belltower for...what? Was the Autumn of Lust her idea to foster The Line?
Possibly. Rain seems dedicated to the university founder's ideals... which include lots of debauchery. Might be both. Spreading MC love and happiness around is a laudable goal, I'm sure we here would agree ;-)
His indicated desire here seems to be...Rain herself. "She stirs even the shiftless to toil." Shiftless definitely sounds like an apt description of everyone's opinion of Jakob. Hmm. Does that mean that neither the watch nor the perfume nor the antidote have any effect on her? Is that our next hint that Rain isn't human, but something else?
Could also have been immortality, given that Rain (and possibly Jacqui) is/are immortal.