How many mothers do you have? At one point in my life I was up to 4, but now I'm really down to just one. I had my own mother, adopted roommates mothers, and aquired a mother-in-law for a while.
But my most consistent "other mother" is still in my life, in a really big way.
My family moved to Missouri when I was about 13. My sister fell in love with the boy across the street later that summer, and I became best friends with his sister. Of course, I spent plenty of time at their place, and 'adopted' both a mother and a father.
Fast forward 5 years and my sister married the boy across the street. Both sides of the family and all of the friends knew each other really well, and it was a great celebration.
A few years later, my sister and brother-in-law had the first grandchild on both sides. About 6 months after that, my parents moved to California. I stayed. I was in college nearby, and just couldn't bear to leave my sister.
Later my best-friend-across-the-street moved 1000 miles away with her family. I became a doubly surrogate daughter in my other family.
In all of this time, my other family and I have shared most holidays and countless family events, plus lots of just hanging out. To this day, weddings and babies are celebrated by both sides of the family, and I'm surrounded by people who know each other and have a long shared history.
Both of my parents have passed away now, and my other father has too, but I still have my other mother with me. On Thursday, I'll be lucky enough to be one of dozens of people at Thanksgiving dinner with her. That's just one of the things I am thankful for.
Everyone needs other mothers. Collect them if you can.