Demi Moore has returned from promoting her Lifetime movie "Five" in New York to spend time in Los Angeles with her husband Ashton Kutcher ... amid allegations the Two and A Half Men star had an affair with 23-year-old blonde Sara Leal. The GI Jane star is still wearing her wedding ring!

The couple, who have been married for six years, have been spending time apart lately while Moore promotes her film ... even reportedly celebrating their sixth wedding anniversary in separate locations.

Ashton, 33, and Moore, 48, spent last night together at their home .... going about their everyday business. The Punk'd creator showed up for work Thursday despite the Jewish New Year holiday. And later in the day, Kutcher proudly showed off his wedding ring while exiting a motorcycle shop in LA.

Both stars have been unusually quiet on Twitter except for random quotes involving forgiveness and making assumptions.

Can their relationship survive the controversy?