You were at the party with your husband socializing with other nobles. You were next to Vincent.

That's when a man named Baron Kelvin went up to both of you as he was introduced. Baron Kelvin was timid and meek but highly respected to Vincent Phantomhive. However, upon encountering the Phantomhives, Kelvin developed an inordinate, all-consuming obsession that nobody knew about ever since meeting them. That's why he was understood you two were special and was worried that he wasn't perfect enough to even be in the presence of the Phantomhinves.

"Oh, excuse us for a moment I need to talk to some people nearby." Vincent said walking away with you in tow.