A little over a month after revealing their engagement on a sneak peek of their reality show, The Houstons: On Our Own, Bobbi Kristina Brown and Nick Gordon have called off their plans to wed.

A source confirms to Us Weekly, "They did split. It will come out in the show."

Gordon, 22, announced his breakup with the 19-year-old daughter of the late Whitney Houston** on Nov. 18, tweeting, "[Bobbi Kristina] and I are not engaged or dating. Just close like we have always been."

Bobbi Kristina simply alluded to the breakup in a series of her own tweets. "I guess it's time for me to follow what mom and the Lord put out on this path for me. Thankful. Mom. XXO."

Quietly confirming their relationship in the months following Houston's February 2012 death, the pair faced intense scrutiny: Gordon was informally adopted by Houston when he was 12 years old, and he and Bobbi Kristina grew up as siblings.

After announcing her engagement to her family on the Oct. 24 premiere of the Lifetime show, Bobbi Kristina said, "They wanna see us fail. I've got one thing to say: 'You won't.'"

An executive producer for the series replied to Gordon's breakup tweet, writing, "Watch to see how it all unfolds on The Houstons on Lifetime TV."

Bobbi Kristina's challenging week continued after she was involved in a serious car accident Wednesday. According to TMZ, the young star lost control of her vehicle and drove down an embankment. Fortunately, she was not injured.

After the accident she tweeted, "My Personal Guardian Angel. Thank you mom. Miss and love you more. You'll never know. Not a scratch and ok. Wow, praise God. Nick Gordon. Serious changes within me."

This article originally appeared on Usmagazine.com: Bobbi Kristina, Nick Gordon Call Off Engagement