[No, a fight isn't happening. Ianto is very aware of the fact that he's the person all of this will affect the most. There's no point in not being entirely honest and saying the hard things here. They have to. It all reminds him painfully of Lisa, and how unwilling he was to accept someone he cared about was a monester. He hates being faced with the possibility of that all over again.]
You know we won't be able to stake you here. It won't last. So any solution we have to come up with won't be the permanent one that I know you want.