I don't get it

People usually say that when they're cheating on them with the person they're referring to as a friend (or that's the joke anyway)
And the "guy" in the picture is a dog.

The dog is a super cool , almost James bond like guy.......she's telling you to not worry about

It's a DOG.

It's a dog.....with a sweet pair of goggles and a dangerous job. Super edgy boi