[Ianto is so caught up in watching him that his own orgasm almost catches him by surprise. Then again it's hard not to get carried away watching him lose control and react to all this. A few final thrusts and he comes inside a female body for the first time in, well, years really. And while he's never prefer this new form to Spike's usual self he's of the same opinion about taking advantage of the situation.
Also if Spike thinks he isn't going to cuddle the heck out of him now he's seriously wrong.]