Ianto is well aware of how independent and determined to take care of himself Jack can be. It's the reason he has to find other, smaller ways to do it, like how he always makes sure he has a fresh cup of coffee, or the way he helps him put on his coat. Its the reason he always tries to be there when Jack dies. He takes care of him when he can, and if this opens up a new way to do that he is nothing but grateful for it.
He hands Jack his chamomile tea then takes a sip if his own, the mug comfortably warm in his hand. "Well then it's an opportunity I plan on taking full advantage of. I like being this close to you."