Depends on the circumstances. If I am really attracted to her, the baby is very young and the father is out of the picture... Maybe.
Depends mostly on your age and where you want to be in the future. I will say most (not all) women in their late twenties or older who do not want kids are not interested in a truly committed relationship of any kind. They may think they are but they are not. If they own a cat, it's worse because they live under the illusion that cat ownership is actually a commitment.