Gray gave no indication to Alice that he had found out she was still married throughout the rest of the dinner. Keeley wasn't sure whether he didn't care about cheating or if he simply didn't want to make things awkward.
Either way, his acting ability was more than a little unnerving. No wonder he had managed to get away with murder.
Gray really was an awfully dangerous person. The current peace between him and the Hales was achieved solely by Aaron and Keeley walking on eggshells to keep him happy. Who knew how long that would last?
He undeniably cared about Aaron but what if he ever offended Gray? Would he turn on them and become their enemy once more? In their last lives, that had been deadly. Things could very easily go the same way again if they made him mad.