Kourtney Kardashian feels sexier since becoming a mother.

The 31-year-old star - who gave birth to her son Mason last December, her child with boyfriend Scott Disick - believes parenthood has ignited an innate sensuality within her.

Speaking at the Beach Bunny Swimwear opening in Los Angeles this week, she said: "Motherhood brings out a whole new glow or something."

Kourtney is really enjoying being a mother and admits she could watch four-month-old Mason laugh for hours on end.

She added: "He has been laughing and rolling over a lot. I love it when he's hysterical and he laughs so hard. It's amazing."

One thing that could be making Kourtney feel sexier is her bigger butt.

The reality TV star recently boasted she loves the fuller derriere her pregnancy has given her.

Kourtney - who gained 40lbs while expecting - said: "I want to try to do squats - stuff that will keep the booty up there!"