It doesn’t end with them. Justin Baldoni has claimed in a fresh legal filing that Blake Lively went rogue on the set of “It Ends with Us” and improvised a kiss that wasn’t in the script. The clip in question shows Lively, 38, and Baldoni, 41, sharing a quick smooch during a scene that Baldoni’s team claims she added herself, according to the new legal filing submitted by Baldoni’s Wayfarer production company on Nov. 13. Baldoni’s attorneys wrote that the “Gossip Girl” star “added [the scene] to