If you agreed with her to meet with the mediator, then I think you have an obligation to fill out the paperwork that's expected. But as Cadet says, do it to protect YOU (not to be amenable), and for gosh sakes RUN EVERYTHING BY YOUR OWN ATTORNEY BEFORE SIGNING ANYTHING FINAL. Using a mediator does NOT preclude you from hiring your own attorney to look over and advise you on the mediated agreement. Knowing that a mediator is doing the heavy lifting, many family law attorneys will charge you only by the hour (or even one quoted sum) to look over and counsel you on the mediated agreement, vs. requiring you to pay a large retainer for what would likely be a long and involved divorce process were there no mediator involved. Our mediator even SUGGESTED that we each do that.
