AceShowbiz -

Nicole Kidman is said to have gone fully naked for some explicit sex scenes on "Big Little Lies", and husband Keith Urban is reportedly "burning up with jealousy!" According to a new Radar Online report, the Australian singer "is not comfortable with his wife exposing herself to the world!"

Nicole plays an abused housewife named Celeste Wright on the new HBO series. The news outlet points out that in one episode, the 49-year-old actress strips down to her birthday suit for a shower scene. The episode also exposes more than just the bruises her character suffers at the hands of violent husband Perry (Alexander Skarsgard). The pair go as far as flashing "plenty of flesh during a racy sex session!"

"Keith must be going nuts with jealousy watching his wife expose her naked body to another actor and the world!" a so-called Hollywood snitch told the publication. Some other "tipsters" said, "While Nicole's acting naughty on the screen, in reality all she wants is to have another baby - but Keith has nixed the idea."

Reps for Keith and Nicole are yet to respond to the report. The couple, who has been married since 2006, shares two daughters, Sunday Rose and Faith Margaret. Nicole allegedly once said of her desire to expand her family, "I still have the faintest hope that something may happen to me this year."