The couple was snapped at Chyna's house in Tarzana, California, on Monday, marking the first time in months that Rob has been seen stepping out in public. The reclusive reality star wore a black T-shirt, Nike basketball shorts, and a blue Los Angeles Dodgers hat, while Chyna was similarly casually dressed in a black hoodie and black pants.
Rob and Chyna arrived back in Los Angeles from Texas -- where Rob reportedly picked up Chyna after the 27-year-old model was arrested and charged with public intoxication and drug possession at Austin-Bergstrom International Airport last Friday -- at 2 a.m. on Monday, a source tells ET. The two stayed at Chyna's house before later going to a beauty salon in Beverly Hills, California, then returned home around noon.
"He's lost weight, actually," a source close to Rob tells ET, "and is madly in love with Blac Chyna!"
Rob, 28, has increasingly become more public since news about his relationship with Chyna broke last week. Aside from posting pics of his new girlfriend on Instagram, he also joined SnapChat on Monday under the explicit handle "Robph**kedme." His first post was a close-up of his face, though his words were unintelligible.
"They're working out. Chyna's cooking healthy meals for him," she said on the Allegedly With Theo Von & Matthew Cole Weiss podcast. "Rob is the coolest guy you'll ever meet in your life. He's realistic, he's an amazing person, and it's sad that people don't get to see that. He's just down to earth and cool."
Rob also Instagrammed a picture of himself lifting weights on Friday, and received plenty of positive encouragement from his followers.
Still, the Kardashian family is worried about Rob's new relationship, a source close to Rob exclusively told ET last week -- and it's not hard to see why, given Chyna's complicated history with the family. The "Rack City" music video star used to be close friends with Kim Kardashian, but the friendship cooled after Kim's 18-year-old sister, Kylie Jenner, started dating 26-year-old rapper Tyga. Tyga is Chyna's ex-fiance, and the two have a 3-year-old son together, King Cairo.
"The problem in this situation is no one wants to push too hard on Rob because of his fragile state," the source said. "The fear is that Chyna is doing this for attention."
But if we're judging by the couple's actions, the relationship appears to be serious. Rob drove his Bentley 26 hours all the way from Los Angeles to Austin to retrieve Chyna after her airport arrest, TMZ reports.
According to her arrest affidavit, Chyna had two pills of ecstasy in her purse when she was arrested for public intoxication and drug possession on Friday in Austin. Watch the video below for more details on her arrest.