(Reuters) — A Delaware judge on Wednesday said former CBS shareholders may pursue a lawsuit accusing Shari Redstone, the daughter of late media magnate Sumner Redstone, of pressuring the company into entering an unfair merger that created ViacomCBS Inc.

Vice Chancellor Joseph Slights of the Delaware Chancery Court ruled four weeks after allowing former Viacom shareholders to pursue similar claims.

In a 157-page decision, Vice Chancellor Slights said it was reasonable to infer that the merger process was not fair and CBS “substantially” overpaid for Viacom.

Redstone’s National Amusements Inc. had controlled about 80% of the voting power of both Viacom and CBS, despite owning only about 10% of the respective shares.

Vice Chancellor Slights said the plaintiffs’ claims “allow a reasonable inference that CBS’s acquisition of Viacom was motivated not only by Ms. Redstone’s concerns about Viacom’s viability as a going concern, but also her desire to shop NAI following their consolidation.”

He said the evidence suggested that CBS directors might have approved the merger to “appease” Ms. Redstone, who had a “dogged determination to make this deal happen one way or the other.”

Lawyers for Ms. Redstone, the former CBS directors and the shareholders did not immediately respond to requests for comment.

Ms. Redstone is non-executive chairman of New York-based ViacomCBS, whose businesses include CBS television, CBS News, Showtime, Comedy Central, MTV, Nickelodeon and the Paramount movie studio.

The merger followed unsuccessful merger attempts in 2016 and 2018. Sumner Redstone had split the companies at the beginning of 2006. He died in August at age 97.

In a footnote, Vice Chancellor Slights quoted from “A Dance with Dragons,” a 2011 novel by George R.R. Martin, some of whose works were adapted into the blockbuster HBO series “Game of Thrones.”

He said the CBS and Viacom shareholders’ “competing claims of unfairness call to mind the author’s reference to the adage: ‘A fair bargain leaves both sides unhappy.’ Whether the adage proves true here remains to be seen.”

The case is In re CBS Corp Stockholder Class Action and Derivative Litigation, Delaware Chancery Court.