Towards the end of last week, Big Sean was posting a teaser about his new collaboration with Jhene Aiko. Yes, the exes teamed up for another song. And this one called "None of Your Concern," seems to be about their relationship. The two had been off and on for a while and I thought it was interesting for the exes to do a song after the breakup, "Single Again," let alone, another one. This time it's Jhene's song with Sean's feature. But after the collaboration, it seems like the two may be together again. TMZ spotted the two hanging out to eat. Now that sounds pretty normal for friends, however, they looked pretty cozy together. In a photo obtained by TMZ, Jhene is sitting on Sean's lap at one point. But if they are back together, good for them!