I'm a little confused as to why Lu Ann was at the hospital and Paul wasn't. Not sure if there was some kind of piano-related emergency that kept him away. Or maybe Lu Ann only went in the first place to score some prescription meds... based on her blank gaze in the first panel, that's probably the best bet.
I don't know if Paul should get too excited about Lu Ann calling his place home. I tend to call lots of things home, personally. When I'm travelling, I call the hotel home. When I'm camping, I call the tent home. When I'm hopped up on prescription meds, I call the inflatable castle at the next door neighbor's kid's birthday party home, too.