The two split in July after Stewart, 22, cheated on Pattinson with married director Rupert Sanders.
However, the two have reportedly reconciled their romance and are seeing a psychiatrist to help them rekindle their romance.
According to mirror.co.uk, the first advise they have received is to sleep in separate beds for at least a month while they "work on communicating, healing wounds and trust exercises".
"Sex is going to have to wait. The plan is that the two of them concentrate on each other and rebuilding their relationship. It has been a tough time for both of them and the psychiatrist has made it clear that this is going to be hard," said a source.
The psychiatrist also insisted they take a romantic break away from the glare of publicity. And they're clearly following his advice after booking a luxurious Brazil hideaway in the heart of the Amazon rainforest.
Deep bonding put Pattinson, Stewart back together
Actor Robert Pattinson reportedly chose to continue his relationship with Kristen Stewart because of their deep connection.
The "Twilight" co-stars were rumoured to have split in July following the publication of images showing Stewart in an embrace with "Snow White and the Huntsman" director Rupert Sanders.
However, it has been reported that the couple has reconciled in recent weeks, after Stewart, 22, promised she did not sleep with Sanders during the affair.
A source told US Weekly that Pattinson took Stewart back because of the strong bond between them.
"Robert weighed his options. He would not even know where to start if he and Kristen were to break up for good," digitalspy.co.uk quoted a source as saying.
Another source added: "They have a very deep connection. He started thinking nobody else would understand his life. His rational voice told him not to toss a three-year relationship for one infidelity."
Last week, it was reported that Pattinson, 26, was considering marrying Stewart.