Rorie might be perfectly fine with Garret having a fake wife, but then it might really hurt him. It was hard to tell, and Garret didn't want to risk having it come out casually in front of him before he got the chance to talk to Rorie first. He deserved at least that. Him and Mal.
"The other husband is more understanding about these kinds of things," Garret said slowly, trying to imagine Mal's reaction to this. He would probably totally indifferent, which actually bothered Garret just a little. "But there's um... well my best friend, recent lover. He might not be quite so okay with this shock. Let me tell them before you flaunt your sassy self in front of them."