The weeks passed by the forest, and Jeyne remained with them. She was pretty happy about finding Lady Catelyn Stark. She didn't make questions about what have happened with her in the wedding.
And the months passed too and with that, Jeyne discovered something. She was pregnant. When she had complete certain of that, she said it to Lady Catelyn.
"My son's ba…by?" she asked.
"Of course, my lady. No man was with me before or after Robb."
"We need to pro…tect you, you have our heir, m…y qu…een" said Lady Stoneheart, looking at Jeyne's eyes.
And so, they protected Jeyne Stark.
They're waiting to the day that they could return to Winterfell, but that was to distant and so, the time passed by them and Jeyne begun to be a member of the Brotherwood.