The month of love may be over, but it seems the lovely sister of the duchess of Cambridge can still feel the love bug sting. But as circumstances would have it, looks like Pippa is going to have a hard time getting her mother's approval, since her sister is wed with the future king of England.

The stunning Miss Middleton has been reportedly romancing 35-year-old stockbroker and property developer, Nico Jackson. But however tall, uber rich, and not to mention gorgeous, Mr. Jackson is, it seems mum Carole isn't entirely swayed by him.

"Pippa seems really happy. But although Carole thinks he's nice, she doesn't think he's good enough," a friend close to the Middletons said. "You can't blame her, her other daughter's married to the heir to the throne so it's always going to be difficult for Pippa to find anyone to live up to William," she added.

Pippa might not be married to royalty like her big sis Kate, but she has been known to date high society men. These include aristocrat investment banker James Matthews and Alex Loudon, a former cricketer from England.

It's a mystery how the happy couple met, but they were spotted together last September at the opening night of Jake Parkinson-Smith's nightclub, 2&8. Fast forward Valentine's Day, tourists have reportedly seen the love-struck pair snogging in a ski resort in Zermatt, Switzerland.

Mike Goldstein, the publisher of AskMen, even tweeted, "Pippa Middleton snogging her boyf aggressively next to me at the bar."

Weeks before the aforementioned canoodling incident, Kate's lil sis introduced Nico to her family during Will and Kate's recent vacation in the Caribbean island of Mustique.

Looks like mum Carole will just have to let this one go because as of now, it appears there's no separating the two lovebirds.