With cold temperatures over the last few days, The Lovers, Grendel and Kako, took advantage of whatever sunlight they could find when they could find it.  In this case, Kako got to it first and took the best spot, but Grendel wasn’t going to let his woman enjoy all that warmth by herself.  That’s why you can see him hidden behind that JLo booty of hers (I hadn’t realized she could hide a whole cat back there!):

And for a slightly different perspective showing that the comfy spots miraculously were found only where the sun was shining through the windows: