“We’ve been cooking a lot. We have dinner nights and we hang out,” the Boardwalk Empire star, 35, tells PEOPLE.
“Just by birthright, I love pastas, so I cook a lot of that – lasagnas and meatballs. But she’s into this whole Tex-Mex thing, which I’ve been catching on to. Guacamole and sour cream, quesadillas and tacos – we’re experimenting.”
“It’s a great feeling. You want to share special things with special people,” he explains. “I’m more than happy [with Ashlee]. She’s a wonderful girl.”
“I’m just happy to be here with my man,” Simpson, 27, demurred before chatting about her expectant sister, due this spring.
• Reporting by BLAINE ZUCKERMAN