Less than a month after Sylvester Stallone's son Sage was found dead of an apparent drug overdose, his sister Toni Ann Filiti has been hospitalized, according to the New York Post. Filiti, half-sister to both Sylvester and Frank Stallone, entered UCLA hospital in critical condition, suffering from lung cancer.

Filiti, 48, has been living in Santa Monica with mother Jackie Stallone, 90, but was rushed to the hospital a couple weeks ago when her condition seemed to worsen. Sylvester Stallone, meanwhile, is in France as part of the promotional tour for "The Expendables 2", his adreneline-fueled follow-up to the all-star ensemble action picture. Stallone is with his wife, Jennifer and their children, while he still mourns the passing of his son, who appeared alongside his father in the film "Rocky 5."

Jackie Stallone told the Post, "After losing my grandson, this has been too much to bear. Toni Ann is not doing well at all. She has lung cancer Stage 4, she has liver cancer, it has spread to her brain. I am doing terrible after having my grandson go, then my daughter [critical] at 48 years old. It isn't easy. I don't know what to do. She has been in UCLA for two weeks. She's on IVs to stay alive. She is on all kinds of IVs to eat."

Filiti's son, Edmund, talked about how inspiring his uncle Sylvester has been, "My uncle has given me a lot of support. I can only thank him." He then added, "We are going to explore alternative treatments as soon as mom gets home [from the hospital]. We think that maybe trying marijuana, kava, different herbal treatments - that might shrink the tumors. We are at the state where all we can do is throw everything we have got at it."

"The Expendables 2" opens Aug. 17, and stars Chuck Norris, Jean-Claude Van Damme, Dolph Lundgren, Jet Li, Arnold Schwarzenegger, Bruce Willis and a slew of other legendary action stars.