Christie Brinkley Battles While Billy Joel Marries Again

"It is heart wrenching to watch Christie Brinkley [descend] into this CHARACTER ASSASSINATION," Gregory Donald wrote on his Facebook page, adding that he thought he and his sister "had developed a relationship that was strong and true."

"I had even left my work to spend extra time with mom and dad and also to take care of Christie's children while she danced and sang on the stage of Chicago the Musical."

Alexa Ray Joel, Christie Brinkley's daughter with piano man Billy Joel, is just four years younger than her new stepmother, which is perhaps why Christie used the word "friend" in her tweet. Also, the mention of "growing family" insinuates that the fourth bride of Billy Joel is, indeed, pregnant.

Do you think Christie Brinkley was wishing the happy couple well, or throwing shade?

[Photos courtesy of Daily Mail and Huffington Post]