Was that the supposedly offending dialogue?
In the US, the woke would say that’s white privilege but the organizer, dressed as she was, invited the question of where she was from and accepts no responsibility. I once asked a someone here in Georgia if she was from San Diego (I am) because she had on a San Diego jacket. No, she’d never been, she just liked the design.
By complaining she is actually stepping on Lady Hussey’s culture and attempts to understand the context of what she’s seeing. This is why woke is toxic, victimhood is seen everywhere. No benefit of the doubt. It’s deliberate to keep ethnic groups divided and it’s exploited for political power and profits.
It sounds like Lady Susan was struggling to make small talk and show an interest in this person.
Sounds more like African descent and Caribbean heritage to me.
Why didn’t she just say where her parents were born.