Can parents control 3 years old to dislike someone they used to like?

I’ve always had a great relationship with the mother and the kid in question. After an argument I had with the mother alone (not in front of the kid that I absolutely adore) the kid’s behavior changed completely… From loving me to almost hating me for no reason at all… It breaks my heart…!

I have talked to the mother about this and she says that is normal for kids this age to change opinions for no reason, so there’s nothing she can do about it.

In fact, the kid is only 3 and is unable to explain any reason, at least to me, so I really don’t know if I am being paranoid and I really feel bad to suspect that my friend might have done something…