Reliable Source: Is Mark Sanford back on with his on-again off-again soul mate?

So are they or aren't they?Rep. Mark Sanford (R-S.C.) and his maybe (maybe not) ex-fiancee, former Argentinian journalist Maria Belen Chapur, continued their super annoying Dan and Serena shtick last week when the couple was spotted out and about and very much together in D.C.