Although the pair recently welcomed their first child together, West is not ready to walk down the aisle with Kim because of her mother Kris Jenner, reported Radar online.
"This will be Kim's third marriage, and Kris doesn't think the Kardashian brand can handle another divorce. Kris would be happy if Kim and Kanye never married because he doesn't let her call the shots," a source said.
"Kanye has the perfect out, he can't marry Kim yet because he is going on world tour later this year. He loves Kim, but just isn't sure about marrying into the family. Kim is so close to her mom, and it is no secret that Kris clashes with Kanye, a lot," the source added.