If it is not reduced to writing, you will have difficulty. There is no reason that the court should believe you over her -- he said/she said is the very nature of familty law and that's why all agreements need to be reduced to writing.
Please note that THESE COMMENTS ARE NOT INTENDED AS LEGAL ADVICE and are for informational purposes only. This response is not intended to create any attorney-client relationship and is only based on the limited facts given. The response might change should additional facts be learned and should not be relied on as legal advice. It is recommended that you consult with an attorney who can properly assess the situation, as well as all pertinent facts, prior to taking any action based on the foregoing statements
Sign up to receive a 3-part series of useful information and advice about child custody law.