I believe the break in their friendship started and ended with Adam. Carole invested a lot in that ‘boy’ and she defined herself as a desirable woman through that ‘boy’ and when Bethenny called him out she simply couldn’t cope. B called him a user and so on. Carole might act like the big feminist but the whole exchange regarding the red scarf guy was telling. She was bragging about him yet we saw him clinging to Ramona and then Bethenny. When B said she won the consolation prize it was the truth. Funny thing about Carole is that the men are the ones determining her self worth. Not the women on the show.