1) After K&B move to New York an attorney, representing an anonymous client, reached out to Blaine and informed him his anon client wanted Blaine to adopt his newborn daughter. The client ends up being Sebastian and I think he ultimately ends up being a part of their lives.
2) The kids are into Superheroes and there is a shout out to rainjoyswriting All the Other Ghosts . The kids dress up as The Ghost and Phalanx for either Halloween or a Convention.
FYI: This isn’t Unplanned Pregnancy, however, that is also a good story if you like Family Klaine.