Husband recalls moment he found wife dying in apartment

The husband of a woman who died in their Sydney apartment has spoken of walking into a "nightmare". (James Ross/AAP PHOTOS) (AAP)

The husband of a woman found dead inside their Sydney home has spoken of walking into the "biggest nightmare" as police continue searching for answers on her suspicious death.

Erin Gilbert, 42, was discovered in the couple's Merrylands apartment after neighbours called police about 11.30pm on Sunday to report concerns for her welfare.