User blog comment:AYET/Chapter 748 - Talk about a debt repayment/@comment-99.243.47.188-20140521234237/@comment-4754162-20140522024350

I'd think they are working together for now due to a common goal - the birdcage - and this means the fall of Doflamingo. But after the arc, it remains to be seen whether they will be BFFs for life or return to pirate-eat-pirate again.