Lady Spencer arrived to nurse her daughter and Bess took it upon herself to take Georgiana's place and order around the servants who raised eyebrows at her. When Lady Spencer reported Bess' behavior Georgiana refused to believe her mother.
After Georgiana's health returned she confessed some of her debts to her husband who flew into a rage (I would be upset too if I found out my spouse had the modern equivalent of a $6 million gambling debt) and screamed for a separation. Georgiana was reasonably upset and turned to her best friend for support.
For whatever reason, though, Bess gave Georgiana no shoulder to cry on. In fact she refused to talk to her altogether!