Kate Middleton Baby Bump: 'Upset' With Prince Harry's Girlfriend Cressida Bonas? Is Pippa Too Flirty? Duchess Stays Fit With Yoga Exercises, Reads Parenting Books, Due Date Approaches

Prince Harry has found newfound love in 24-year-old Cressida Bonas, but the young model might be stirring up some bad blood with the pregnant Kate Middleton. According to news reports, the Duchess and sister-in-law of Prince Harry is "upset" with some remarks made by Bonas about Kate's younger sister Pippa. Apparently, Cressida does not like the "flirty" friendship between her new beau and his 29-year-old sister-in-law. Bonas also happens to be the half-sister of actress and model Isabella Anstruther-Gough-Calthorpe, who used to date Prince William.

This news comes just hours after Prince Harry had reportedly enlisted Kate for advice concerning his new love. According to a source:

"Kate, who wants nothing more than to see her rowdy brother-in-law finally settle down, sat with Harry and counseled him on the do's and don'ts of building a great relationship. She's told him: Don't drink too much - and none of your filthy jokes! Be attentive; never talk about ex-girlfriends - and don't put yourself in any more situations that are embarrassing to you and everyone around you! It's obvious Cressida has won his heart - so we're all hoping that he doesn't mess things up. Even William's amazed at his brother's newfound maturity in realizing that he's found the right girl - and desperately wants to do the right thing and make it work."

Though she might be a little stressed over dealing with helping her brother-in-law with a girlfriend that she supposedly is upset with, a new fitness regiment might be helping her stay calm. According to sources close to the palace, Kate has added Yoga to her exercise routine while still going for a handful of long walks throughout the week. A source says, "Kate has a yoga instructor visit her at the palace."

Though we don't know if the baby will be a princess or a prince, the Duchess has been reading up on how to make sure the baby stays healthy during the pregnancy up to the birth in July. "She's been reading as much as possible, from how to be a good parent to how to stay healthy for the baby," the source has shared.