From posts by the lady on whose behalf people are taking offence, I have gathered over the years that she is very comfortably off. She has made a comment or two about the Brexit vote affecting her monetary well-being. She has mentioned a house she owns in England although she lives in Switzerland.
So petra's remark can be seen in that context: a wee quip that is nonsense, and therefore slightly funny, when compared to reality. That's how I saw it. Nothing to apologise about.
I hooe you are quite well, still comfortable financially, gj, and having a lovely time with your family in .england or wherever you are right now.