It took a while, but I think Marcy is finally fully comfortable with the boys. Yesterday, she chased Murphy across the apartment. They ran out of room so they turned around and Murphy chased her to the other end. And now she's play fighting with Connor on the cat tree. I've caught her playing with Mickey, too. It's much nicer than watching hiss and swat at them all the time! And I like seeing her with energy. When we first found her, she didn't do much other than sleep but she was so malnourished. I think she's much healthier now.