Well we will never know, because she came home and immediately went to a co-worker for a spay. And he kept her over a couple extra days because the stress was beyond me (the local tomcats were still coming around and howling) as I was a grad student and preparing for mid-terms.

Odds are, yes, she was 'with kitty'. But she lost her girl parts as soon as she came home! I did ask him if he could tell and he said that it was possible but not noticeable when he spayed her.