Pete Wentz denies reports that parenthood is quickly approaching for him and fiancee Ashlee Simpson, but OK! Magazine is sticking with it’s scoop that the twenty-eight year old Fall Out Boy will marry the youngest of the singing Simpson sisters in a shotgun wedding in San Diego next month. And Jessica Simpson will have none of it! Simpson family sources tell OK! that twenty-seven year old Jessica is green with envy over her kid sister’s baby news.

“Jessica never imagined that her tom-boy younger sister would have a baby first. It would be very hard for her not to be jealous.”

“Jessica Simpson has yearned for a baby for years. She’s told friends that she can’t wait to be a mom and has even joked that if she has to, she’ll resort to making her hairstylist pal Ken Paves the adoptive daddy.”

“Jessica couldn’t be happier for her sister but still can’t help feeling jealous,” says an OK! source. “She’d love to be planning a wedding with a baby on the way.”