is being sued for sexually assaulting a woman, who claims he forced himself on her in his hotel room ... this according to a new lawsuit.
In legal docs, obtained by TMZ, Kelli Tennant claims that in May 2017, Walton asked her to come meet him at his Santa Monica hotel to discuss a book she was writing. She says the 2 had a business relationship that went back several years and she wanted him to write a foreword.
In the suit, Tennant says when she arrived at Walton's hotel, he convinced her to come up to his room so they could discuss the book.