The Weeds star says things are "great" with boyfriend Jeffrey Dean Morgan


In Weeds, Mary-Louise Parker plays a housewife who starts selling drugs after her husband (Jeffrey Dean Morgan) dies. But in real life, Parker and Morgan’s romance is very much alive.

“It’s going great!” Parker, 43, says of Morgan, 40, who also died on Grey’s Anatomy (after romancing Katherine Heigl’s character) and Supernatural (after making a deal with a demon to save his son).

And don’t believe any gossip-column reports of trouble in paradise: “The New York Post said we were fighting at Nobu, but I’m certainly not dumb enough to fight at a [high-profile] restaurant like Nobu.”

In fact, she recently spent Valentine’s Day with Morgan (“We had a nice dinner”) and her other favorite guy: her son William, 3, with actor Billy Crudup. “He made Valentines for everyone,” she says.

Parker, who stars in Oxygen’s The Robber Bride (March 3, 10 and 11), starts filming the new season of Weeds in April. Is it hard being a working single mom? “No, because I spend a lot of time not working,” she says.

She even has time to take William to his class: At a time when most toddlers are learning to tumble, he’s taking French lessons. “He speaks a little,” Parker says. “He can count to seven and say, ‘May I please have two cookies?’ ”

To find out how Mary-Louise felt about playing Brad Pitt’s wife in The Assassination of Jesse James by the Coward Robert Ford, how she can spot a backstabbing woman and more, pick up the new issue of PEOPLE, on newsstands now.