09/28/2012 02:13 pm ET

Kristen Stewart, Robert Pattinson Reconciliation: Friends Doubt It Will Last (REPORT)

Kristen Stewart and Robert Pattinson are reportedly back together -- or are at least giving their relationship a one-month trial . Too bad their friends don't think it's going to last.

RadarOnline reports that friends of the couple, who met on the set of "Twilight" in 2008, believe that once the press tour for "Breaking Dawn - Part 2" is over, so will the "back on" status of their relationship.

"Kristen and Rob's friends absolutely don't believe that this reconciliation is going to last," a source told the website, adding that Pattinson's pals think he agreed to get back together with Stewart just to make things easier during their promotional obligations for the final "Twilight" film.

The couple's friends are the only ones who don't have faith it will last -- or don't want it to. RadarOnline also reported that Pattinson's two sisters, Lizzy and Victoria, immediately came to his defense when they learned that Stewart cheated on their brother with Rupert Sanders, and they don't approve of his decision to take Stewart back, because they believe "once a cheater, always a cheater."

With friends and family casting doubts on their second go at things, it's looking more and more like the couple's decision to get back together is a well-orchestrated publicity stunt.

Kristen Stewart & Robert Pattinson