(a) Motion to Strike. If a party deems any pleading or part of it filed by another party to be a sham, that party may move to strike the pleading or part of it before the cause is set for trial and the court must hear the motion, taking evidence of the respective parties, and if the motion is sustained, the pleading to which the motion is directed must be stricken. Default and summary judgment on the merits may be entered in the discretion of the court or the court may permit additional pleadings to be filed for good cause shown.
(b) Contents of Motion. The motion to strike must be verified and must set forth fully the facts on which the movant relies and may be supported by affidavit.