Robert Pattinson and Kristen Stewart have reunited for a month to see how things go.

The couple split over the summer when Kristen was caught cheating on her boyfriend of four years with her “Snow White And The Huntsman” director, Rupert Sanders.

Pattinson is trying to forgive Stewart and is willing to give it a month to see if they can mend things.

An insider close to the couple reveals, “Robert has had a lot of time to reflect on what has happened and, while he may still be hurting, he has also come to realize just how important Kristen is to him.

<strong>“He has warned Kristen that he might never be able to forgive and forget. But he’s agreed to give it a month to see if they can make it work. If they can’t he says he will walk away.”But, a source said of the “Twilight” beauty, <strong>“Of course Kristen is ecstatic to have Robert back. But she is still on edge because she knows it is only a trial and Robert could change his mind. She says she feels like she is walking on eggshells.”

A few sources report that Robert Pattinson even gave Kristen Stewart an ultimatum to either marry or split for good.

“Rob told Kristen the only way he can forgive her affair is if she truly commits to him. Rob has been keen to marry Kristen for quite a while and he doesn’t want to get back with her unless he knows she means it for life too,” a source stated.

Source: Opposing Views