Just reading this now - really great! In MEAT I always thought that at the end, when Jack is fighting with Gwen he is really talking about (projecting) his fears regarding him and Ianto. He knows they are liable to get each other killed at some point and for Ianto that would be terminal. It's why in the episode, when they split up at the warehouse, Ianto goes with Owen and Jack stays with the girls.

I always figure the two (Jack/Ianto) have a long talk about this later on! (A relationship talks!) I haven't seen the episode in a long time, so I'll have to bookmark this entry and give it another look!