Jay Z has reportedly promised to be more "hands-on" if he and Beyoncé Knowles have another baby.

The superstar couple already have little girl Blue Ivy, three, together and have sparked rumours they are to be parents again.

More light was shed on this when Beyoncé posted a photo of herself on the beach on Instagram last Sunday, showing a vivid bump under the sand covering her.

Despite having a turbulent 2014 which saw Jay being accused of cheating, it's thought the pair are putting their problems aside as they apparently expand their family.

"Both Beyoncé and Jay have promised to make changes to make it work," an insider told Closer magazine. "He's said if they do have another baby, he'll be hands-on and call time on his partying, while she is trying to be more trusting."

Claims of troubles arose after a video clip leaked online last May, showing Beyoncé's sister Solange lashing out at Jay in an elevator following the Met Gala.

However, Beyoncé has made her desire to have more kids no secret, previously telling Oprah Winfrey she definitely wants another child, and she's apparently keen to make her marriage work.

"They're both at their best when they're together, but Beyoncé still finds it difficult to trust things will be different," the source noted. "She hopes a new baby will help them focus on their commitment and put a difficult year behind them."

One person who isn't convinced the songstress is pregnant again is Beyoncé's former Destiny's Child bandmate Michelle Williams. She insists it could be the star's knees forming the bump in the sand photo and thinks people should stop speculating .

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