He opened his mouth, showing an impressive array of dagger-like teeth, then a blue liquid started dripping off of them, and he sunk his teeth into the one section of her neck, the liquid acting as a fast-acting pain-killer and delivering the nano-bots into the 'problem area'. He then pulled his teeth out, and the wound closed quickly as the nano-bots went to work...
Then he got off, and circled 'Mother' on all fours, before lying down at her feet, and quickly reverting to 'inactive' state....