I could be wrong, obviously, but it doesn't seem Christine to me.
If we compare the two women it seems to me that the one in Logan's picture is more "mature" than Christine, who still has a kind of teenager physique. She has a very thin stomach compare to the woman in the bed and also the hips seems to be wider for that woman. Also, not an expert on hair style, but even without the tail the hairs seem not to match for color and shape.
But again, it's just an impression of mine, perspective and lighting can change a lot the perceived appearance.
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But, just in case it is Christine, I remind that in the evening there is an event Dylan/Ellie/Christine. If it is the case, maybe the brother and sister are gonna play their revenge?