Is He Ours?

(Y/n) and Mark were together for awhile before (Y/n) found out she was pregnant with his child. Struck with fear for her and Mark's future, she decided to end things with Mark and let him carry on with his career without a distraction. 10 months later Mark and (Y/n) bump into each other at the grocery store. The chat about Fallon begins and Mark suddenly realizes he's a father. What will their future hold?