Yes and I’m trying to figure out why there was a sudden jerk... if you look up until that moment you can see his hand reach behind her, which is nothing abnormal at first glance, but then a few moments later she jolts. Why did she jolt? Did he pinch her butt? Did he grab (read: manhandle her) after she said she preferred his conservative brother more (which was obviously her joking around)?
His hand clearly moved south.