In the video that has been posted by a certain undesirable newspaper, our protagonist, Matt, the man who looks like your sister's first boyfriend with a car, looks down briefly at the carpet and positions himself to stand on what looks like a mark on the floor.
He is now in the prime position to be caught by the CCTV. He engages Gina, an old family friend, and does his best to "make it look good", hence the butt pinch. She's a bit reluctant but she's going along with it because he's a friend and he needs this favour.
Is it Hancock’s way out? “Oh no. I was having an affair and now, darn it, I’ve been caught. Naughty me but now I’ll HAVE to resign, won’t I?”