Jennifer Aniston: Driving Courteney & David Apart?

The constant negativity may be taking a toll on Courteney Cox's nearly eight-year marriage with David Arquette.

Jennifer Aniston is still recovering from her breakup with Vince Vaughn, and her divorce from Brad Pitt; and Sheryl Crow, dealing with her recent disengagement from Lance Armstrong.

Star’s source believes, “this creates problems between her and David that wouldn’t be there otherwise.� “Courteney is probably suddenly seeing more negative traits in David,� adds another source. “But now I bet he can’t do anything right.� And in turn, David is spending time alone to give Courteney the space she needs.