I don't think this was the case: that day she unfollowed him (for the second time, she already did it the day before) and deleted the picture in that moment, and he unfollowed her too. And she followed other spiritual/quotes themed accounts that day, just as she does when she feels down. It was not a random unfollow/follow, it was all concentrated in 2 days, and he followed the same pattern, just immediatly reacting to her unfollow/follow accordingly. Imo this would be too much of a coincidence, something propably happened between them that days, an argument or similar. If she follows the statistics of her usual behaviour, the next one of this episodes could be the last one (it happend with Joe, the forgivness thing, and the other guys too when she started deleting pictures).