At 3 she's old enough to understand how to manipulate you. I'd set up a nice night time routine(ask for her input) and put her to bed in her room and then leave. If she gets up calmly take her back to bed. If she screams and cries let her - once she figures out it's not going to get you to come in and sleep with her she'll stop.
I do have to add that my DD7 went through this around the same age although she had always been in her own room. I gave her a shirt of mine and one of DH's. She still has them on her bed and occasionally sleeps with them on. And yes, there were night she came into our bed. If she woke me doing so I'd bring her back to her own room. On occasion DH and I were so exhausted we didn't notice until we woke in the morning with a little foot in our back.
You'll have in rough for a few days but she'll adjust quickly if given the chance.
I do have to add that my DD7 went through this around the same age although she had always been in her own room. I gave her a shirt of mine and one of DH's. She still has them on her bed and occasionally sleeps with them on. And yes, there were night she came into our bed. If she woke me doing so I'd bring her back to her own room. On occasion DH and I were so exhausted we didn't notice until we woke in the morning with a little foot in our back.
You'll have in rough for a few days but she'll adjust quickly if given the chance.
i am trying very hard not to say something judgemental but this may cause SERIOUS attatchment issues (on both your parts). wow....if this isn't a road to off topic discussion...what is? i am not against nursing..i did it for both daughters an am still nursing my almsot 10 month old. 



