Rob Kardashian and fiancée Blac Chyna are expecting their first baby together, but it seems like Kris Jenner's son is more nervous than happy about the news. The reality TV actor is reportedly struggling with anxiety as the couple prepare for the arrival of the baby daughter.

"Missing from all the family bonding has been Rob, who is still reclusive and struggling with his weight and anxiety issues. He still spends a lot of his own time his place, as opposed to staying with Blac," a source told Hollywood Life.

The Arthur George sock designer is believed to be struggling with some weight gain. However, he has remained active on social media and has time and again shared happy moments along with his fiancée and her four-year-old son King Cairo. Nonetheless, there have been issues between the two, which was quite visible on their show Rob & Chyna.

According to reports, the Kardashians are hoping that Rob would change after the arrival of his first child. "Kris [Jenner] and the rest of the family hope Rob changes his ways when the baby arrives. Hopefully the baby helps Rob become a good father and the man he is meant to be," the source added.

Interestingly, the 29-year-old seems determined to change his lifestyle. Last week he shared a slim throwback picture of himself and Chyna. "Oh yeah we snapping back lol. Baby will be here in 4 weeks and I'm done with carrying this pregnancy weight. Me and my baby gonna be right. MOTIVATION TIME! We almost there Chy. F— Chy looks so bomb here aghhh!" Rob wrote on Instagram.

Oh yeah we snapping back lol,,, baby will be here in 4 weeks and I'm done with carrying this pregnancy weight 😩😩😂😂 me and my baby gonna be righttttttt ,,, MOTIVATION TIME‼️ we almost there Chy👶🏽👶🏽👶🏽 FAAAAACK Chy looks so bomb here aghhhh 💙💙💙💙💙💙💙👌👌

A photo posted by ROBERT KARDASHIAN (@robkardashian) on

A source close to the sock designer told People magazine that he "just hasn't been able to mentally motivate himself to do something about it. It's like an evil circle — the more he gains weight, the worse he feels mentally".