"Oh, that's right," she says, slumping sideways and propping her head up with one hand. It'd happened to Biffy, hadn't it, around when Robin showed up? If she were entirely sober -- and not trying to avoid thinking about her myriad losses -- she might've remembered. "But it's usually an all-at-once sort of thing."

Which isn't what Sweeney's describing.

"Are they, er... good... memories?" she asks, more than a little uncertain. She rather doubts it -- the brief reverie he'd slipped into hadn't looked like a happy one, and optimism is a hard sell at the moment.