tv: wibbly wobbly timey wimey

HEADCANON TIME

So i was rewatching Doctor who Season 3 episode Blink, and I realized something.

Sally’s friend, Nightingale, had a daughter named Sally after she was sent back in time. 

Later on, the police man says he married a girl named Sally when he was sent back in time, and shows us a picture of a girl who looks like she could be the descendant of Nightingale.

What if they’re the same Sally?