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many thanks for all the input. molly is now definitely coming around. she is showing all the signs of learning to trust us, head butting, rolling over and exposing her belly, and twice she has jumped up and joined us on the bed instead of staying under it. the food and litter tray have now been moved to their permanent places downstairs and she has had no problem finding them. she still spends hours asleep under the bed but from past experience of cats, this is quite normal whether they are in a familiar environment or not. they are basically just lazy and like any warm, comfortable and quiet place to chill out. she still doesn't come downstairs into the living area when we are around but we have heard her in the hallway while we are watching the tv so she is obviously just taking it slowly and being cautious, again normal for a cat. she has become much more friendly towards us and i think by christmas she will probably be integrated into the household. having said that, she is not used to children, never has been as her previous home had no children, so the plan to give her our room for safety, keep the kids out at christmas probably still stands.