The romance between reality TV vixen Kim Kardashian and Reggie Bush is apparently on the rocks -- again, RadarOnline.com has learned.
The high-profile couple split temporarily last week, as Kardashian flew to Miami to shoot her sister's reality television show, while Bush spent time in New York, shooting a calendar. But sources say the separation could be more serious.
An insider on the set of the 2011 Calendar Guys shoot last Thursday confirmed Bush was complaining about the troubled on-again, off-again romance.
"It was a two hour shoot and Reggie spent most of it texting on his phone," the source said. "In between photos and costume changes, everyone on the set could tell something was going on. He became a little tense, at one point.”
Our source said that at one point, Bush disappeared into a nearby office "to use his cell phone in private."
The source told RadarOnline.com that after that heated phone call, Bush openly complained about his relationship with the world famous socialite.
Later that night, Bush was spotted at hip New York City nightspot 1Oak, at Robin Thicke's 33rd birthday party where "he was flirting up a storm," according to an onlooker.
He spent the majority of the night with an unknown brunette and talked for an hour straight, said the source.
Bush remained in New York for the weekend.
On Saturday, after a lunch date with his agent at the upmarket restaurant Serafina, the NFL star told waiting paparazzi that he did not know where Kardashian was. (She was scantily clad on a yacht in Miami, at the time.)
When asked if they were still an item, Bush said "no more questions."