Female friend wants to meet my mom? Why?

Back in the spring I (20, M) went to visit my friend from college (23, F) at her work to give her families business support. I kind of like her and we are just kind of mean to each other most of the time, but she's really sweet to me other times. She called me a sweetheart and she invited me to come and study and go swimming at her house, but I didn't make a move on her then bc she was with a guy long distance and I don't homewreck. She broke up with him over the summer

Anyway back in May I went over to visit her and she knew I couldn't drive myself there so she asked if I came with anybody. I said my mom was in store and she said "Oh I want to meet her" and smiled. I thought it was weird bc that seems like a relationship thing and asked her why and she just kind of smiled at me and said nothing. Next timeI stopped by to shop she asked me the same question. She met my mom and they had a small conversation, and whenever she sees my mom while at work or around town she always tells me about it

Does anybody know what is going on?

Female friend wants to meet my mom? Why?
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