Khloé Kardashian wants a ''grand'' romantic gesture from Lamar Odom.

The 'Keeping Up With The Kardashians' star is reportedly desperate for her estranged husband to make a move so the pair can look at rekindling their romance.

A source shared: ''She'd much rather him do something completely grand and spontaneous.

''[But she's] scared to give him all her heart again.''

But despite wanting a sign from the former basketball player, the 30-year-old television personality isn't quite sure yet how they should move forward in their marriage.

An insider added: ''She's stuck in the 'unknown' stage. She doesn't know what the future holds for her and Lamar.

''She can't make her mind up on how to proceed with her marriage.''

The brunette beauty - who filed for divorce from Lamar in December 2013 - reportedly ''can't stop thinking'' about her ex and has even taken to ''studying'' the pair's relationship in the hope of finding out how she can fix it.

A source added to HollywoodLife.com: ''She can't stop thinking about Lamar. When she's working out, she's thinking of times they used to workout together and how he used to push her to the limit when he would make her do some of his basketball conditioning training.

''She can't even watch television without thinking about him. Now she's studying her relationship with Lamar using the Johari Window technique that she watched the last episode of 'Being Mary Jane.'''