Whatever Arya had said didn't make sense. The letter could have been mistranslated, or she could have added that part to make it look like he was her brother.
Rodriguez was deep in thought, and that is one reason why he agreed to let Michelle go shopping with Donna when she asked. He wanted to stay alone.
Arya did approch him after dinner, but he straight up refused to acknowledge that there could be a connection between them. He was born as a rogue pup, and this was the nearest pack that he could find... but it didn't make sense! Moonsglow pack should have been nearer, and being in wolf form, he should have stumbled there instead of reaching Moonstone pack territory!
If what Arya said was correct, then that means that grandpa Michael knew he was his grandson, so why didn't he say anything?
