Ellory shot Antigone with a bad look at her comment. She would have probably replied with something equally petty and childish, hadn't Tiberius intervened. He then proceeded to lecture her, as though she was a child. (To be fair, her behaviour was childish.)

"I would never bring shame to my husband, but I can't sit behind when I am being provoked. Because your wife is displeased with you, Cousin, she tries to ruin my happiness with Claude!"