I think probably all this is leading up to her realizing she's taken on too much and then doing something about it (probably not enough, but at least something).
My other take-away from this episode, as well as many of the others, is that God was sure smiling down on Bethenny the day he introduced her to Jason! That man is a gem, and I can't imagine anyone more perfect for her in terms of patience, understanding, generosity, and assertiveness when appropriate. Not too many men on this planet would be able to understand her and see the lovable person underneath all her "stuff." I think she knows how lucky she is to have him and Bryn, and is even getting to see the joy of having loving parent-figures in her life ... so all the more reason she should have put a lid on the birthday tantrums!