Prince Harry has recently become more serious with his girlfriend Cressida Bonas. The royal baby's possible future godparents' relationship, including Pippa Middleton's flirty texts, may be causing a rift between Prince Harry and Cressida Bonas.

Earlier this month, British magazine Grazia reported that Harry, 28, and Cressida, 24, moved in together in London after attending the wedding of Thomas van Straubenzee and Lady Melissa Percy.

"She went back to London with Harry on the train and has been staying at his apartment ever since," a source said, according to Fashion & Style.

"Harry's told Cressida he loves her, which is not something he does lightly."

Despite their relationship doing well now, last month Now magazine reported that Cressida was annoyed with Harry's friendship with Pippa Middleton, 29, the sister of new mother Kate Middleton. According to Fashion & Style, Pippa's boyfriend Nico Jackson was also unhappy with their interactions.

"Nico adores Pippa but her flirting's off the scale," a source said. "She often texts Harry with saucy jokes, suggesting they meet up."

"They've had some big rows about it," the source continued. "Nico's asked her to tone it down."

The Duke and Duchess of Cambridge welcomed a baby boy yesterday and the Prince of Cambridge is third in line to the throne. The Daily Mail reports that Harry and Pippa are most likely going to be chosen to be the royal baby's godparents.

CTV News reports that Prince William and Prince Harry have six godparents each, and Prince Charles has eight.

The royal christening of the child will most likely take place soon, as it usually occurs between six weeks and two months after the baby's birth.