Viacom Chairman Sumner Redstone: Legal Docs Claim Mental Incompetence But Healthy Sexual Appetite

Viacom Chairman and CEO Sumner Redstone is in the middle of a legal war, with his ex-lover/caregiver fighting in court to regain control over decisions that will keep him alive ... and her arguments involve sex.

Manuela Herzer claims in legal docs she was once romantic and for a long time a close friend and confidant with the 92-year-old Redstone -- who also started Midway Games which produced Mortal Kombat -- and in September of this year he chose her to make medical decisions on his behalf.

Herzer claims things changed radically just one month later when Redstone's health and mental state really deteriorated. She claims Redstone's people threw her out of his home and she no longer had the power to make medical decisions.

Herzer now claims Redstone was in such bad shape mentally he did not have the capacity to strip her of the power he gave her just a month earlier.

In her docs, Herzer suggests a marker showing Redstone's mental deterioration was when he started ignoring doctors orders. She says he "demands, to the extent he can be understood, to engage in sexual activity every day, even though Dr. Gold has repeatedly recommended that he abstain from daily sexual activity."

The docs also claim Redstone can't write, his signature is almost a straight line, "appearing as if someone moved the paper under his pen," he has "spontaneous crying spells" and can only converse in "brief grunted responses."

An attorney for Redstone tells us, "Ms. Herzer's claim that she filed this lawsuit out of concern for Mr. Redstone is preposterous." They added, "It proves only that Ms. Herzer will stop at nothing to pursue her personal financial agenda."