[ Such a hard nut to crack, huh? That's fine, he always did like a challenge and they already have a whole new setup going here. Maybe he's not at a point where he's interested in consciously messing around with Jack but it'd be so easy to escalate the bruise messages into something that requires audience participation — or at least an audience.
For now, this is fine and if he can't get a stronger reaction out of Ianto just using his mouth, he'll have to up the ante. Shifting his position a bit, Spike coils an arm around Ianto's leg, hoisting it up on his shoulder with some care — meant to jostle and surprise, not cause head injuries on the edge of the pool. ]