We had a chat with a friend of the Stallone family who cleared up a few things about the death of Sly’s oldest son Sage. Sage’s autistic brother Seargeoh, 32, lives with his mother Sasha. Apparently, family members feel Sly DID ignore his son after he married Jennifer Flavin and started a new family. And Jennifer did not encourage Sly to stay in contact with his “old family.” Sage rarely saw his father and unfortunately Sage called Sly on his birthday July 6, and left a message saying he’d like to get together, but Sly didn’t call back, according to our source. Sage’s mother Sacha paid for all the funeral expenses (the funeral is at Forest Lawn on Saturday) but Sly may or may not have chipped in some money later. The Stallone family is not a happy one. Sly has banned his mother Jackie and half sister Toniann (who has lung cancer) from the ceremony.