Drama alert! Miley Cyrus and Liam Hemsworth seem to be happier than ever since they reunited late last year after calling off their engagement in 2013. But In Touch has exclusively learned that there’s one thing they’re still butting heads about — having babies! Watch the video below to see the issues between Miley and Liam.

Friends think that their differences when it comes to starting a family could be the final straw for the couple, who met while filming The Last Song when they were only teenagers. A source close to the couple exclusively tells In Touch, “Friends are saying that it’s only a matter of time until they call it quits for good.”

Miley has made it no secret that she doesn’t think marriage is necessary to be committed to a person; earlier this year, an insider said she wants to wait “years” before marrying her beau. And on The Ellen DeGeneres Show, she explained her views on monogamy and marriage, saying, “I think young people have a different idea of partnering and not feeling that this necessarily means this is going to have a legal document signed and dated. “It’s really sharing a life with someone and not about a legal paper that tells me anything even though I fought so hard for LGBTQ rights to be able to get married even though I don’t really want to.”

If the 24-year-old songstress is in a rush to start a family, we don’t exactly blame her. As In Touch previously reported, she was struggling to get pregnant earlier this year. “She has been doing everything right. She’s sober, has been eatingr really well, and she’s drinking lots of water and having lots of sex,” the source told In Touch in May. “But still no baby.”

For more on this, pick up the latest issue of In Touch — and for more exclusive content sign up for our newsletter!

For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!