The singer, who gave birth to her second daughter in March, explained that staying at home is "relentless".
She told Prima Baby & Pregnancymagazine: "If I'm completely honest, I find staying at home the real work. Not only is it relentless, but also a thankless task when you've done three loads of laundry, cleaned the kitchen surface a gazillion times, made the beds, and had your partner say, 'Glad you're having a day off'. Stay-at-home mums are the unsung heroes of the world. Fact!"
Asked about her exercise routine, Klass replied: "I'm still spinning with tiredness from the night feeds. I don't have an exercise routine at the moment, namely because I'm allergic to the gym.
"I have decided not to be so hard on myself and just enjoy my babies and my chocolate buttons!"
Klass also praised her partner Graham Quinn for being a "hands-on" dad.
She commented: "Gray is very hands-on and also very funny in his execution. Whenever it's his turn to look after the baby he lays everything out in very specific piles as if he's going to war!"
> Myleene Klass: 'Look up to your parents'