I have started a sequel to Family Ties. It is called "Life In Slow Motion" and can be found on FanFiction . net.
The Doctor's and Clara's relationship has been more than just a little rocky ever since he turned back into a Time Lord, but when Vastra asks them to watch over teenage Isabel in 1975 for a few weeks, they soon discover that a looming alien threat is the least of their problems. Sequel to Family Ties.