That scene is verily like unto a cheesegrater on the nipples. Thankfully, IIRC, it's not repeated. Plus it's in the middle of a story in which Jack makes Gwen offer to die in order to fix the schoolgirl screwup with which she started the whole fatal mess. And at the start of a season in which goody two shoes Gwen becomes more and more corrupted, 'cos it ain't easy to stay human in the face of all this shit.

What we really need, though, is some Jackly dialogue about Gwen. My stummick hurts, so I might hit the sofa later and rummage through the season looking for Evidence.