Generous aunt Jessica Simpson

Jessica Simpson can't wait for her younger sister Ashlee to give birth.

The 28-year-old singer thinks she will make an amazing aunt to Ashlee's baby, and intends to be extravagant with gifts for her niece or nephew.

She told E! News: "I'm going to spoil the kid rotten, that's for sure. I think my sister's going to be pretty strict, actually, because she's been so good throughout her pregnancy."

Jessica also revealed she can't believe 23-year-old Ashlee is soon to become a parent. She added: "Ashlee is just such a woman. I'm like, 'Oh, my gosh - what's happened to my sister?' "

Meanwhile, Ashlee's husband Pete has dispelled rumours the couple are having twins. Reports that Pete's musician friend Tyga had confirmed the pair will soon be welcoming two bundles of joy into the world are untrue, Pete has revealed. Pete, 29, said: "It's going to be a big disappointment when it's only one! I think I started the rumour about twins!"