By peoplestaff225
Updated July 01, 2008 10:30 AM

If his parents get their wish, 2 ½-year-old Alastair Wallace Stewart will be a big brother sooner rather than later. Penny Lancaster Stewart reveals in new interview with The Mirror that her and husband Rod Stewart "are trying for another baby." The 37-year-old model says that the couple wanted to start trying right after Alastair was born but decided to "hold out" until after their June 2007 wedding. "Now it’s a case of wait and see," Penny said, adding that the couple is "not even thinking" about fertility treatments yet.

Penny said that between she and Rod their son gets "a good mix" of parenting styles. While Penny describes herself as "strict," she said Rod is "very laid back."

Click ‘continue reading’ for Penny’s thoughts on being a step-mom, breastfeeding and more.

"Everyday [Alastair] does something different," Penny said, and right now the couple is having fun with their son as he masters his vocabulary. She adds,

When she married Rod, Penny became a step-mom to Rod’s six children from previous relationships. It’s a role she says she welcomes, and approaches with candor. "The best way to get with step-kids is to be yourself," she says, because "kids can sense if someone isn’t genuine." She adds,

Penny calls the pressure for new moms to return to their pre-baby size "unhealthy." Public comments about her own postpartum weightloss caught her off-guard, for she says that at the time she wasn’t at all focused on getting her figure back. Instead, Penny says, "Alastair was my main priority."

Source: The Mirror; Photo by