Have you ever been someone's 'work spouse'?

I have had a “work spouse”, a “soulmate” who wouldn’t need to ask what I was thinking about something because she was thinking the same thing. We could complete each others sentences, and were (and remain) good friends outside of the job (even though the company is now out of business).
My wife & I were at her wedding, and I have been to funerals for her mother and her husband’s father in more recent times. She’s probably the reason I believe in “soulmates”....even though our relationship was never a romantic one, she is probably as close as anyone else I’ve ever met as far as being of like mind with me.