Motion to change Parenting Time

I have standard parenting time (every other weekend and every Wednesday. I exercise my time 90% of the time. The only time I don’t get them is when I have to work over and my ex has stated if I don’t get them on time I can’t have them at all. She is not flexible at all.

She has now filed a motion for modification of visitation were she claims because I have failed to pick them up more than 50% of the time (lie).

Anyone have any adice or tips on defending myself. I will definitely be hiring a lawyer. It wouldn’t think she would have any grounds for this modification. Anyone with similar situations?