If routine is not an issue, then I would stick
To your guns, offer the reassurance that she needs but get her to stay in her bed.
R has always been an IS and as such at time of sleep madness if in GW doesn't work for us as it feels as tho R cottons on and then hey, she plays up so I'm crawling out camando style. So as she's gotten older I tend to offer her all the reassurance she needs - so in this instance start te BT routine earlier to have time to entertain checking for monsters, tell her you have special mummy powers and zap any spaces to make anything scary go away - the mummy touch is magic don't you know. Then tell her that you will just be in your room if she needs you. She may in the first instance call you back an untold amount of time, keep
Going back in, offer reassurance (don't keep
Zapping the goulies away - you'll be there all night!) and leave. Rinse and repeat until she gives in and she will.
For silly o'clock WU - take her back to her rooms and wi/WO if needs be - exhausting for a few nights granted but I think worthwhile. Otherwise, you will have this situation ongoing
What do you think?
Hena