Gilgo Beach suspect Rex Heuermann’s wife has cancer — and it’s spreading: lawyer

The estranged wife of suspected Gilgo Beach killer Rex Heuermann is battling spreading skin and breast cancer, and her insurance is about to run out because she was covered by his policy, The Post has learned.

Asa Ellerup, 59, of Massapequa Park on Long Island, has fought the disease for several years and now needs about 12 to 18 months more of treatment, family lawyer Robert Macedonio said Friday.

But she got her medical insurance through Heuermann, her husband of 27 years — and it will only continue as long as his Manhattan architecture business can cover the premiums, the lawyer said.

That gives her about two months’ more coverage, Macedonio said.

“That’s a big fear and stress on her on top of all this other stuff that’s going on,” the lawyer said.

Ellerup and her two children — Christopher Sheridan, 33, who has special needs; and Victoria Heuermann, 26 — only returned to their home last week after Heuermann’s July 13 arrest for the murders of three women.

He is the prime suspect in a fourth.

All of the bodies, along with seven others, were found dumped along the marshy beach shoreline a few minutes from the family’s home.

Ellerup has said their kids “cry themselves to sleep” since Heuermann’s arrest.

“But I said, ‘We’re together,’” Ellerup told The Post. “ ‘That’s really what matters right now. That you and me are sitting here together and we will get through this.’ ”