Right, I have read the statement and your wife makes serious allegations. However, if she is now wanting to retract those allegations it is likely that the court will expect her to make a formal application to do so.
She will need to complete form FL403, which you can find here: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/819379/fl403-eng.pdf
Please be aware that the court does not have to remove the order - if they believe your wife and children continue to be at risk they can leave the order in place. The court can also inform social services to undertake an assessment.
When you attend the hearing tomorrow, if you and your wife are in agreement, you can both inform the judge that she has decided not to proceed with the order and would like it removed (she should complete the FL403 form above).
If this does not occur I would strongly suggest that you prepare a statement in response to your wife's statement, giving your version of what happened or denying her allegations, otherwise you will not have a defence prepared if your wife changes her mind and wants to keep the order in place.
Does that clarify your position?