Rob Kardashian's workout-heavy relationship with girlfriend Blac Chyna seems to be paying off by the pounds! The former reality star looked significantly slimmer on a toy-shopping trip with Blac's son, King Cairo.
Looking good, Rob!
The 29-year-old Keeping Up With The Kardashians star ditched his usual hoodie while taking Blac Chyna's son, King Cairo, to Toys R Us on Wednesday.
This situation is still a sticky one, however, as three-year-old King is son to Blac's former flame Tyga, 26, who is now dating Rob's sister Kylie, 18.
Talk about awkward!
Nevertheless, sources reveal that Rob's relationship has been going well with Blac Chyna (despite family drama), as the exotic model sported a suspicious diamond ring on her left hand while on a girls-only trip to Trindad last month.
"Rob has fallen hard for Blac Chyna," a source recently told PEOPLE. "She makes him super happy and this is the first time he's felt so optimistic about life in years. She helps keep Rob in check with his health and makes sure he is abiding by his diet and exercising."
"He feels there is strong potential for this relationship to go a long way, but for now, they are very content and complement each other really well," the insider added.
What do you think of Rob's dramatic weight loss? Let us know in the comments below!