I hope not. They spent so much time establishing that no one who doesn't know what Torchwood does can possibly understand what they go through that putting Rhys IN the loop then taking him back OUT sounds like exactly the thing to make Gwen snap once and for all. She's tried to explain things to him once already-- back when she confessed her affair with Owen-- and chickened out. I don't think she could go through it again.

Though it'd certainly make her incipient affair with Jack less complicated.