Regret I Ever Lost You

It's been six months since the break up between Mia and Cameron. Cameron and Lily are now living together but their relationship is very rocky and they may break up.
One day Cameron was in a cafe and he saw someone he thought he may never see again, but that was not all he saw. What he saw may change his life for ever. Will Cameron break up with Lily? What was it that Cameron saw at the cafe that may change his life?