If anything, her ability to experience pain may represent a good thing in her mind. People without pain can do incredible damage to themselves unknowingly, and many have serious injuries from when they were children and hadn't yet trained themselves to be cautious. So, to her, getting to experience pain may represent relief from the stress and vigilance of trying to deliberately protect her body.
I think your are talking about different pain than laser burning.
Most definitions of pain of pain contain terms like torment, distress, suffering. Not what someone would like. If someone never felt pain before and they say upon feeling something that they like it, you think they really feel pain? It sounds more likely to me that she felt something different. She wouldn't know of course, if what she felt was pain.