Vincent does take the opportunity to stand up, accompanied by the creaking of floorboards (or possibly his knees) as he returns to being a good foot and a half taller than anyone has any right to be.

But he doesn't flee the scene immediately. He leans over, feels around for the mound of blankets that is Phalanx, and then deftly tucks them into the couch. He gets Robin, too, tugging a loose blanket over and vengefully stuffing the corner of it between the cushions--causing Robin, in his surprise, to giggle like a six-year-old.

"Goodnight, kids." Vincent states, "Have good dreams or whatever."

It's hard to tell if he's annoyed or amused. Maybe a little of both.