Are Justin Timberlake and Jessica Biel having marriage trouble? Justin Timberlake's grandmother reveals details on Justin Timberlake and Jessica Biel's marriage, suggesting that the power couple are too busy to get pregnant, and rarely spend time alone together these days.

According to heatworld.com, Justin Timberlake's grandmother, Sadie Bomar, told the Sun that she's worried about Justin Timberlake and his wife, Jessica Biel, and that they are unlikely to get pregnant anytime soon.

Sadie told The Sun: "They are married but they are so busy, both of them, it's hard going.

"I'm sure when it's right to have children they will, but not now.

"They do love each other dearly but they are apart so much it's going to be hard going for them.

"I think Jessica finds that really tough. She's on her own a good deal."

Sadie is also worried that Justin's not spending enough time with Jessica, and that they don't stay at home together very often due to his busy schedule.

"If he's not coming back at night that puts a strain on things, of course it does," she said.

"It's hard to keep it all going but you have to have faith to keep it all going.

"I have faith in them and I believe they love each other dearly but I know they need time together."

As we previously reported, rumors that Justin and Jessica's marriage was in trouble began when they hadn't been seen in public for a while, and then Biel didn't join Timberlake for the 2013 American Music Awards on Nov. 24. She also skipped the 2014 People's Choice Awards.

Biel recently revealed to The Daily Beast how she stays close to her husband, despite his hectic schedule as a music icon:

"It's not easy... Your relationship just has to be a priority, you have to make sacrifices for it, and you have to make time to see each other no matter what. You have to pick whatever number of days as your cut-off point, and no matter what, one person has to make the journey to see the other person if one of you is far away. It has to be important enough to you to make the effort, because it is a lot of effort," she said.

Timberlake, 32, and Biel, 31, married in October 2012.