Swayze rehearsed all of his Dirty Dancing routines with Lisa (in 2006). Photo by: Courtesy Patrick and Lisa Swayze
Fighting Together| Patrick Swayze
Having found his footing, Swayze had been alternating between stage and screen roles and in December filmed The Beast, a pilot for the A&E cable network in which he plays an FBI agent. (The network released a statement saying the show remained under consideration for the fall schedule. His rep denies reports that he passed on the upcoming comedy Fired Up because of his illness.)

Although he and Lisa never had children – she had a miscarriage in 1990 and he told People last year, "we just missed our window; we got so focused on our world and our careers that we missed the boat" – the couple dote on their menagerie of dogs, prized Arabian horses and rodeo cattle. "Like any great marriage, they seem to move together as one person," says Kelly Lynch, Swayze's costar in the 1989 cult classic Road House. "They're like a single organism. She is a strong, strong woman – very funny, very kind, very smart. They love each other and it's apparent. The partnership is for life."

Now more than ever. "You can see Lisa put her husband before herself and fight back emotion," says Don. "It's very admirable, but you know she's got things going on inside that she's not expressing because she's staying strong and positive for my brother." As Swayze continues to fight with everything he's got against the biggest enemy he's ever known, his most powerful weapon remains, as ever, the love of his life. "He looks into her eyes and he sees nothing except, 'Everything is going to be okay,'" says Don. "No matter what he's going through, it's okay. She's just there."

• By Michelle Tauber. Reported by Alexis Chiu, Oliver Jones, Julie Jordan and Brenda Rodriguez in Los Angeles and Kristen Mascia and Marisa Wong in New York City