Are A.J. McCarron and Katherine Webb engaged?

Alabama Crimson Tide quarterback A.J. McCarron and his girlfriend Katherine Webb posed for a picture last night during an event in New Orleans.  The only significance to this is the caption that Martha Stewart put on it.

Oh my. Tout le monde est ici! A J mc Carron and fiance katherine webb posed for a photo. Emeril in attendance pic.twitter.com/QKbCJWhd

— Martha Stewart (@MarthaStewart) February 3, 2013

Did they get engaged recently and have decided to keep it quiet?  She isn’t wearing a wedding ring, so perhaps Martha was merely mistaken.  Or perhaps Martha just accidentally spilled the beans on their relationship.