"Does that feel that good, Raven?" He asks, whispering it along the back of her neck, his body pressing fully to hers letting her feel just what her and Charles do to him.

There's a soft groan out of Charles because that metal... it hasn't stopped. Won't until Erik stops it. Instead of paying too much attention to the sensation (hard to do like the man's lips on his sister's spine), he moves forward capturing one of her nipples into her mouth.