Thornheart was watching bluestars kits and then one of them said "mommy where are you going momma?" Before petalkit got an answer her mother walked out the door and when she started to cry thornheart reassured her when she stopped she had seen her brothers playing with the elders so she went to play too. The reason bluestar picked thornheart was because thats her sister  and fireheart used to be with thornheart when bluestar and thornheart were apprentices. Fireheart hated her after she cheated on him with ravenclaw. Ravenclaw used to be ravenpaw he left thunderclan and then joined again for thornheart and they had kits he couldn't believe that she would do that she was a pretty  she cat with greystripes and ginger fur she and fireheart were just freinds now.
TIME SKIP( at moon stone )

Blustar and fireheart touched their noses to the moonstone and Bluestar got renamed bluefur her old warrior name thats what it was before she was made leader. Now fireheart was firestar and bluestar watched painfully as he received his nine-lives and then the yowling stopped his fur had grew longer he was stronger he still loved her though