Very well written, I only see a couple of tells that makes me think it is fiction. I've been in similar situations even with American girls, so it's mostly believable with a cute little Thai Princess.
The condom acting as a cock ring, seems to me it would break.
The only lube mentioned was saliva,
BS π€£
most of the rest of this rings true, even the sizes, if you take into account that Asian women are often very tiny and that girls tend to exaggerate penis sizes a bit. I had many estimates like this:
"YOU'RE AT LEAST TWELVE INCHES!!!"
12" π€£π€£π€£π€£π€£
at least π