Of course Kurt returned the embrace - because he finally got to hug his mother, something he never thought he would be able to do. And...was she crying? She was crying. He was getting a bit choked up himself and there was the potential for him shedding at least one Man Tear.
Because he wished he knew why. Why had she given him up? But the answer was something neither of them would get, at least not right now. He tried not to focus on it, however. "Here..." Smiling a bit, he pulled back only slightly. Just enough to BAMF into the other room for a box of tissues for Raven, then appear back in his original spot .5 seconds later with the offering.