So was it just strategy that had Johnny Devananzio hooking up and seeming to fall for Camila Nakagawa on "The Challenge: Battle of the Exes" (Wed., 10 p.m. ET on MTV). The couple, who had previously had a fling -- thus getting them paired up for this season -- but unlike many of the other pairings, they actually seemed to be developing deeper feelings for one another.Or at least, they started hooking up on the show.