Continuity mistake: In the episode prior to this one, Clay severely beat Gemma in the face. Bruised and cuts. Swollen eyes. This episode, which is the next morning, her face isn't nearly as bruised - it sure wouldn't have healed that much overnight. And the swollen eyes aren't as bad either.
Revealing mistake: Piney, who has supposedly been dead for days, swallows and moves his mouth while Opie lies crying beside him. It is while Unser is telling him to go see Gemma's face.
Suggested correction: You can never assume how someone would heal or swell.
Clay beat her severely. Perhaps you should watch the scene.