Good job! Sure glad you got her before she gave birth out there. I get nervous sometimes though. I have trapped cats in the past that look very pregnant and have found out the next morning they are filled with milk. Luckily my vet is usually good about doing a spay first (risky for her newborns) so she won't continue reproducing. I let them go as soon as she's able to stand up. It's sometimes hard to tell if a cat has just given birth though they tend to stay with the newborns for 24 hours. They still can look pregnant for a few days after birthing until the skin stretches back.