She is absolutely joking here! Sandra Bullock and her step-children have a wonderful relationship - we all know that! :) But let's play along.

Sandra's step-children think she is "evil".
The 'Proposal' star raises three kids Chandler, 15, Jesse Jr., 12, and
Sunny, five, with husband Jesse James and admits they sometimes call her a monster.
The 45-year-old actress said:

"They call me step-monster. Every time anyone
asks, 'Is this your mother?' I say, 'Tell them what I am.' And they go,
'She's evil you know!'
"They're 15, 12 and five, so there's puberty, getting to puberty and,
hopefully, far off from puberty. But I love it. You just prioritize. It's
there's a playground incident, we drop everything and deal with it."

Sandra insists even her husband is a bit "scared" of her as well.
She explained:

"I'm a great b***h. We all have it in us. It's fear. It's
insecurity. It's all of those things. I'm not easy to live with. But, thank
god, he loves me for me. He's scared of me - you haven't seen me in the
morning!"

But when it comes to her own body, Sandra is a lot less strict, particularly
when it comes to her diet.
She added to Britain's Look magazine:

"You get paid to do it, so you stay
away from the doughnuts. But the day the filming is over I eat so much c**p
I make myself ill. I love it when I gain weight.
"I love my body when I'm fit and when I'm not - as long as I feel healthy.
I'm not one of those, 'Oh my god, I have to fit into a size whatever!' I'm
so happy with what I have and I love that I can change it."

What a great attitude! :)