"I call him my on-again, off-again lover because we're apart by oceans. Or, well, one ocean. You know me, I'm a loner, so it's OK," said Silverman.
"His daughter turned 18 and he wanted to go home. He was here to be with his nearest daughter, now she's off, she's gonna start her own life ..."
The couple met while filming Masters of Sex, in which Sheen played the lead role of Dr Masters and Silverman had a recurring role in seasons two and three.