The age difference and the fact that you're co-workers isn't necessarily a problem, but I too would be wary of anyone with a kid. I've had men who have kids approach me, assuming that every woman out there must want to help them co-parent or worse, expects you to raise the kid for them. And quite frankly, when I want to have kids, I'll worry about parenting, I'm not interested in doing it for others at this stage of my life, and I'm older than you. So I can appreciate your reluctance to get more involved.
Find out, at least, what her expectations are if you really like her. If she's looking for a daddy, and you're not up for it, move on. She's not the only woman out there.