Rex watched Ahsoka running after their daughter and sons. She would use the force to slow them down just a little so she could catch up, and then let them run again.
The girl was their first, and took after him, being majority human with brown hair and dark skin. She inherited her mother's brilliant blue eyes which was lucky because neither of the boys had. The boys had inherited more of Ahsoka's traits then his. They had red skin, sharper teeth and lekku. They had his eyes though so that was something.
It had been seven years since Order 66. Since they lost their friends, Anakin and Padme.; Padme to death, Anakin to the darkside. But they watched over Leia, growing more like her mother. They had regular updates on her from Bail Organa, but they occasionally went to the palace to see her for themselves.
Rex watches Ahsoka, playing with their children, knowing full well that they are all so lucky to be here. Ahsoka could have been killed along with their daughter during Order 66, Rex through the clone wars. Rex thought of the soldiers deaths during the war, the brothers he killed to defend Ahsoka.
Ahsoka still hopes Anakin is redeemable, like Padme said. She believes Anakin is overlooking them, ignoring their presence on Alderon. Rex believes it's only a matter of time before her finds them, and they have decided they will leave Alderon to find somewhere safer.
Rex stood and went to join his wife and children. He and Ahsoka had been looking at ways to slow down his excelled aging. They had found a few bits to help but really, he was now 40 years old biologically. Sweet young Ahsoka was only 24 years old, she used a force therapy to help him become more attuned to slowing age. Their children had all inherited the gift of using the force.
Ahsoka buried her lightsaber, to commemorate those lost in the Clone Wars. Rex held on to his blasters in case he needed to protect his family. It was who he was. Rex grabbed his daughter and held her up above his head. She squealed in delight.
This was his world, and even though it was one that was forced upon him, leaving him scarred, he wouldn't have it any other way.