Kelly Clarkson has a very ''active'' sex life.

The 35-year-old singer - who is stepmother to Savannah, 16, and 11-year-old Seth, and has River, three, and 19-month-old Remington with husband Brandon Blackstock - likes to keep her bedroom activities varied, while her spouse is a fan of ''spontaneous'' love making, and she admitted the pair would happily ''stay in bed all day'' if they could.

She said: ''Any time we're in a discussion about sex with a bunch of couples, Brandon and I stay pretty quiet.

''To keep it family appropriate, let's say we're just a lot more active than other couples.

''I'm a person who loves change. He loves spontaneity. Having a set time or place [to have sex] would be boring to us.

'' When I met Brandon, I wasn't looking for a friend. I have a lot of great friends! I was looking for a lover. I had never found someone I was truly passionate about, who I wanted to stay in bed with all day. The fact that I did, well...I was going to latch on and take advantage of that.''

The 'Love So Soft' singer has changed since becoming a parent because she is no longer ''fearless'' and most of her worries stem from not always being able to ''protect'' her brood.

She told the new issue of Redbook magazine: ''Literally, having children has brought fear to my life. That sounds horrible, I know, but before kids I was fearless.

''Now I go to bed and I have nightmares of someone just grabbing my little girl and running. It's always about me not being able to protect my kids somehow.

''I'm a mama bear. Just recently our nanny told me that an older kid was mean to my daughter at the park and that she just crumbled.

''I'm glad I wasn't there, because I wouldn't have handled that well. I totally went off on that six year old in my head.''