Quote (fuzzy159 @ Jun 26 2016 03:14pm)
He loves her. He has admitted he would do anything for her multiple times. What better way to win her over than helping get her home back with her brother?
Plus technically it isn't even his army. Do you think the Tullys would betray Sansa?
He says that to her, he told Lysa that her sister was the only person he had ever loved while killing her after kissing Sansa
And it's house Arryn not Tully
Tully's were one of the only people who might recognize the Starks that didn't come to the battle but they were sieged by Jaime Lannister