An elderly Westchester philanthropist worth $70 million was taken away from his wife and admitted to a Baltimore hospital by two of his sons, who convinced their ailing dad to change his will and put them in charge of the family fortune, according to a lawsuit.

The men then limited their ailing father’s communication and visits with the rest of the family, barring him from having a cell phone so he could talk to them privately, his daughter alleged, and refusing to let their mother be alone with the dad — “relegating her to a chair in the corner of his hospital room.”

Thomas E. Hales’ sons are now acting like “tyrants” to their 89-year-old mom and four other siblings, “using financial threats and coercion to bully and punish … anyone … that raises any question or requests any information” about the family money since their father’s death in 2020, their sister alleges in court papers.

Hale was known for investing in and growing the once-struggling Union State Bank from about $23 million to $3 billion in assets, before a $575 million merger with Key Bank in 2007.

Hales and his wife, Alice, lavished their “significant wealth” on Hudson Valley institutions such as Iona College, Phelps Hospital, and various medical causes following a 2007 double lung transplant at the University of Maryland Medical Center which helped Hales survive pulmonary fibrosis, his daughter Lianne said in the legal filing.

His health deteriorated in 2015, but instead of spending his last months with Alice, Hales’ sons William, 61, and Terence, 55, allegedly falsely claimed their dad’s meds needed to be “tweaked” and moved him to a Baltimore hospital — forbidding their mother to visit via private jet because they deemed it too expensive, their sister claimed.

Alice Hales had to go by car to see her husband, who was denied a cellphone to call her on, Lianne charged.

“The fact that Mr. Hales — a titan of industry and wonderful, personable man — was denied his own cell phone so he could speak with his wife, friends, and family privately without [the brothers’] involvement, control, and monitoring speaks volumes,” according to the Manhattan Supreme Court filing.

They even denied their mother’s bid to move to her preferred assisted living facility in Westchester, saying it cost too much, according to the litigation.

The sons allegedly moved their dad for “the express purpose of causing Mr. Hales to alter his estate plan documents to ensure [they] would have lifetime control and dominance over the Hales Family fortune — of which they generated zero — and change[d] the state residency of Mr. Hales from New York to Maryland so as to avoid New York State estate taxes upon Mr. Hales’ death,” their sister charged in court papers.

Once in Maryland, William and Terence had Hales change his state of residency, apply for a driver’s license and register to vote “even though he did not have the physical or mental capacity to do either,” said Lianne, who had been her parent’s main caregiver for years before he was moved.

Hales also changed his will three months before his death, leaving William and Terence as “de facto” heads of the Hales family’s assets “with extensive levels of control and power,” claims Lianne, who said in court papers she’s not challenging the new estate documents.

Lianne Hales is suing her brothers to force them to open the books for the Hales Family Foundation and the individual trusts her father created for each of his six kids. Her lawyers declined to comment.

William Hales could not be reached for comment. Terence Hales did not return messages seeking comment.