Hi,
First of all, she is not a dog, a prisoner, or a animal that needs to be caged in.
Second, let her sleep in the bed you have started her to sleep in - usually a smaller one is more comfy for theme since it reminds them of the vomb.And does she sleep with a sof toy? Let her chose with one to sleep with.
She is a girl whom you have nurtured to the very best.
We do sometimes still sleep together with our 4,5 year old - especially when she is sick and we wan't to have 100% control over her, she has know decided to sleep in her own bed. We also have our 6 month old in bed with us, yes we have a King sized bed, and yes, it's a little bit tight, AND we enjoy it.
When our 4,5 years old was 2,5 - just like yours, did we do like this - see below. Right now are we all in our King bed because both girls are sick and we want to have optimal coverage to see where their colds take them. Both have bad history of pneumonia - yes the older have had it twice and the younger one got it during christmas, and when they get it, it comes fast.
So, this is what we did - both mom and dad should take turns, sometimes it's even easier if ONLY dad does it, since the child usually knows what buttons to use on mom.
1 Take out the full sized bed from the bedroom
2 Tell her a few hours before you all go to bed that she will sleep by herself in her bed tonight, BUT, that either your or daddy will lie there until she falls asleep.
3 Show her that she will have her night light/s on and when/if she wakes up she can easily call on you - mommy or daddy, and you will come as soon as she calls - A PROMISE YOU HAVE TO HOLD, it's all about her feeling safe when it's dark outside.
4 Lie with her in her bed UNTIL she falls asleep.
5 If she calls on either of you, you just go there and see what she wants. a, Does she want you to sleep with her,- stay until she falls asleep again, b, or does she want to sleep with you. Let her come with you.
6 Do the same thing night #2 - sometimes you even have to let them cry out - just as they didw hen they were younger and they took naps in the crib, or stroller
7 It takes some time for kids to break the order you have started for them. As long as you are honest and support them will they reach great goals.
Use tons and tons of great words the next day, to make them feel they really did a SUPERB job.
Personly I do not like the Super Nanny. I think she is to rough and hard on the children. YOu have to listen to your own child as well your own gutfeeling and follow it.
I'm a preschool, as well as a AMI montessori teacher, and have read Child and Youth Psychology - in all 5 years of child developement with all that includes in it.
I'm not saying I'm right, what I say are only suggestions and then you have to follow your own instinct - which usually is the only right way. Read all the advices you've got, they are all great, and then make your choice- mix it up.
Good Luck,
L.