I'm not sure if Betsy is loving Spike or if she has a slightly more evil plan. You know, along the lines of "if I make it look like we're cuddling no-one will suspect a thing if he accidentally gets squashed to death. Bwahahaha."
PS - about 20 seconds after I snapped this pic they were tearing through the house, leaping on each other, pinning each other down and trying to chew each others ears. So, situation normal.