That was kind of harsh. Its your aunt after all, I am assuming by blood, thus your kin. Even if she wasn’t by blood you shouldn’t feel like that.
You have to understand, its Pakistan, majority of people there can’t afford houses like that.
If I were you, I would have acted super impressed and amazed. I would have said, “wow aunt, this is a beautiful house, even better than ours”. Its sadaqa, you would have delighted her heart.
I was in Karachi this December, and my cousin was like “look at all these new roads and flyovers, you prob don’t even have ones that nice in Houston” “I was like, yeah man these are even better”.
Obviously anyone who has been to Houston knows it has massive freeways and roads, Karachi could never compare. But its about keeping peoples heart, their proud of what they have and you should make them feel good about it.