serendipity; the faculty or phenomenon of finding valuable or agreeable things not sought for.
Violet found a lot more then she bargained for when she met Harry, a man who was supposed to be dead.
Serendipity; The occurrence and development of events by chance in a happy or beneficial way.
Or, coincidentally.
"You came into my life when I needed you the most, when we needed you. I didn't know it then, but I'm sure of it now, this feels like serendipity"