That and Kobe's money is the basis of this pitiful feud. Kobe's mother fell out when Vanessa and Kobe first got together and have been ever since. She sold all of his old jerseys, shoes, and trophies out of spite because Kobe wouldn't purchase her ANOTHER house as big as the one he bought for Vanessa's mother. It's well documented. Joe Bryant is bytch made for allowing his wife to act like that towards their son, even if they feel that what Kobe did was wrong.
Point blank, Kobe's mother is jealous that Joe cannot provide the same lifestyle that Kobe is giving Vanessa being an EX-NBA player.... and the fact that he married that Mexican chick.