Pippa Middleton, 28, likes to keep the public guessing by going around with a bevy of young, eligible bachelors, but the royal sister-in-law to Prince William, 30, is the first to know that it's not always about romance.

Pippa and her French companion, who picked her up at the airport, rented bikes for a leisurely ride and sipped coffee at an outdoor cafe, reports E! Online.

It's not the first time the mystery man has been in the public eye. He was also spotted with Pippa last summer at a party in Paris, when he identified himself as "just a friend."

Last month it was rumored that Pippa had reunited with her on-again, off-again boyfriend, Alex Loudon, 31.

For more on Pippa Middleton:

Pippa Middleton Re-Emerges After Olympics, Karl Lagerfeld Remark

Pippa Middleton Scores $620K On Party Planning Book

Pippa Middleton And Prince Harry Romance Rumors Intensify

Who Is Pippa Middleton's Boyfriend, Alex Loudon?

Pippa Middleton Breaks Up With Alex Loudon

Pippa Middleton Gets Her Own Show On TLC

Pippa Middleton Wows At William And Kate's Reception

Pippa Middleton Vacations In Spain Without Alex Loudon

A Newly Single Pippa Steps Out

Pippa Middleton Sparkles In London

Pippa Middleton And Alex Loudon Reunite

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