Just months after Robert Pattinson broke up with his cheating "Twilight" co-star Kristen Stewart, the couple has reunited, via the British site The Sun.

The couple reportedly had a heart-to-heart conversation, and Rob forgave Kristen for her "stupid mistake."

KStew, 22, admitted publicly this summer that she cheated on Rob with her "Snow White And The Huntsman" director Rupert Sanders, 41. Photos were also published of Kristen and Rupert embracing each other.

But Rob and…