Aww, with Lord Rosslyn present, no knock-down, drag-out family fight - though Freddy & Davina might not show proper decorum & restraint if George inherits the whole of Lady Kendal's estate (the will itself would be interesting if Lady Kendall lays out her reasoning for the chosen distribution of her estate rather than simply parceling it out without explanation, and given that there are two wills, she probably did. Will we get a look at the unchosen-by-Scruggs will? If the chosen will is favorable to George, will the others accuse him of undue influence on Mr. Scruggs?). Surely the Duke will understand the meaning of Rosslyn's presence, and might admonish his first son & daughter-in-law to mind their tongues.
They may be unaware of the degree of George's separation from Caroline, however, for the Duke, this means treating with his third son rather than Caroline, and that might come as a relief. It will be interesting to see if George decides to support Freddy's bid for advancement anyway, to foster some goodwill or perhaps for a favor to be returned later.
If Colonel Stewart leaves Caroline, she'll be feeling alone, save for her social circle which includes other disfavored parties (e.g., HRH Princess of Wales). If she takes up with another lover, one wonders if she'll be more discreet. There's still the question of how (or even if) she'll retaliate against George and his friends/supporters …