Ashton Kutcher and Demi Moore
Ramey; Andreas Branch/PatrickMcMullan.com/Sipa
01/26/2012 at 04:55 PM EST
His active Twitter page has gone silent about Demi Moore
and he's been partying in Brazil
, but a source insists that Ashton Kutcher
's actions – and inactions – are not what they may seem.
"Ashton is deeply concerned for Demi," says the source, noting Kutcher was in Brazil to work on an ad campaign when he heard about Moore's hospitalization.
"He still cares about her and wants the best for her. But their marriage is ending and they are both moving on with their lives."
Kutcher, 33, and Moore, 49, announced in November that they were divorcing after six years of marriage, and friends of the actress have since worried
about her signs of mounting stress and declining health.
During Moore's recent crisis, Kutcher was in the South American country to shoot a catalog for the Brazilian fashion brand Colcci. He also attended a show at Sao Paulo Fashion Week and stepped out with Brazilian celebrities.
The Two and a Half Men
star has continued to update his Twitter page, but has mentioned nothing about Moore. Instead, on Monday – the night paramedics responded to a 911 call at Moore's home after she suffered an apparent seizure
– he Tweeted a picture of himself "surfing the streets of Sao Paulo" in the rain.
The source says that Kutcher is now on his way back to Los Angeles and will be back at work on the set on Monday.