The body of a pregnant Westchester woman was found Friday in a Bronx park after her boyfriend confessed to killing her and told police where to look, a law enforcement source said.

Ashley McDuffie, 27, was found strangled in Seton Falls Park, near the Mount Vernon border.

Her boyfriend, whose name was not immediately released, admitted McDuffie was pregnant with his child, and said he killed her because he wanted to get back together with his estranged wife, the source added.

McDuffie had two other children, ages 3 and 6, who were unharmed and staying with relatives.