In the September issue of Glamour magazine, Spice Girl, mother and designer Victoria Beckham opens up in a full-length interview and answers the question always on people's minds: why she is never seen smiling.

"Do you know, I don't know?! I actually used to smile a lot in pictures," she said. "I think I only stopped smiling when I got into fashion. [Laughs] Fashion stole my smile. I've created this person. And I'm not saying that's not me, but I wouldn't say that's the whole me...It's an armor that goes up."

Beckham serves at the magazine's first ever guest editor and also stars on the issue's cover, in an image of her only wearing a tiara and bracelet, and covered in soap suds and blowing bubbles while lying in a bathtub.

Aside her new endeavors in the fashion world, Beckham also talked about reading the controversial but popular "Shades of Grey" series during her free time.

"I even bought my mum the book!" she said. "But every time she tries to engage in conversation about it, I kind of dodge the subject. I don't really want to talk to my mother about S&M."

Beckham performed last night at the closing ceremony of the 2012 Olympic Games, which reunited for only one night all of the Spice Girls to perform their hits "Wannabe" and "Spice Up Your Life." Her designs were also sported by Great Britain supermodels that walked the arena stage in a catwalk, wearing Bechkam's designs as well as those by Vivian Westwood, Erdem, Alexander McQueen and Burberry.

When finally asked about the future of her family - she is married to athlete David Bechkam with which they have four children - she said, "I'd never say never about another baby. It's a juggling act - a career, family, a husband who's busy. But I'd never say never!"