system
surprised: A few years ago I came home to an unexpected party for my birthday.  My wife (who was my girlfriend then) had planned it all with my friends without me knowing.
human
A few years ago, before we got married, my wife planned a party for me for my birthday completely without me knowing.
gpt
That sounds like a pleasant surprise! 
human
It really was!  I walked into my apartment to like 15 more people than I expected.
gpt
Thats so sweet of her and what a great memory to have! 