...he might end up having to tell Kylo his own True Name. It would be one way to even up the scales fairly quickly, except I'd imagine that the exchange of True Names is something that happens only between the closest of friends (which they are NOT) or -

Or spouses.

The fast and dirty way for Hux to even out the debt he owes Kylo Ren is to do the fae equivalent of marrying him. Immediately. Right now.

Hux: *eyes start glowing and hair starts waving in an unseen breeze as he levitates in sheer fury*. The sex had better be fucking WORTH IT