A Belgian former model is going after her ex-husband’s $90 million trust fund, saying the born-into-wealth globe-trotter — whose great-grandfather founded MetLife — is a deadbeat who refuses to pay $1.3 million a Swiss divorce judge awarded her.

Michele Bouman, 47, married William P. Stewart III, in Brussels in 1990.

They had two children and lived a life of luxury in a Rhone Valley chalet with servants, vacations on yachts and trips to the Caribbean on private jets, according to Bouman’s Manhattan Supreme Court filing.

The hazel-eyed beauty even quit modeling to be a full-time mom.

Then they split in 1999 and Stewart, also 47, moved to a $3.3 million Greenwich, Conn., home with his girlfriend, according to the suit.

Bouman sued him for divorce in a Swiss court and won a $1.3 million judgment, which he has refused to pay, according to court papers.

The slender brunette won the case on default after he failed to show up for a May 2012 hearing.

She filed to enforce the judgment Wednesday in New York, where the trust fund is located.

She also got custody of their two children, a 20-year-old daughter and an 18-year-old son, who attended the elite private boarding school Les Aiglons, “described as the Rolls-Royce of schools” in the Swiss divorce ruling.

Witnesses in the Swiss divorce case testified that Bouman “devoted herself to her children’s education, in an intensive and remarkable manner, at the expense of her personal life.”

The Swiss judge said Bouman deserved the seven-figure payout because she “found herself pushed into the select circle of multimillionaires” after marrying the trust-funder.

“Without any professional experience or proper training and considering the age of [Bouman], she cannot reasonably be ordered to take a new [modeling] job,” the judge wrote in his ruling.

“The doors of the fashion world are closed to her,” the judge reasoned.

Stewart told The Post he had no comment because he hadn’t been served with the lawsuit. Bouman’s lawyer also declined to comment.