The grapevine has kicked up the Drake and Rihanna dating rumors up a notch. According to the latest reports, the two are now (finally) officially dating (again).

TMZ seems to be the source of this rumor. The tabloid website cites "multiple sources extremely close to the couple" who claim that the two musicians "have gone from casually hooking up to seriously dating" and are giving their relationship "a serious shot."

"We're told Rihanna wants to spend as much time with Drake as her schedule will allow -- because he treats her better than anyone she's ever been with. Not a high bar," the website reports.

On March 14, Hollywood Life reports that the Nothing Was the Same rapper referred to Rihanna as his girlfriend at London's Zouk Tea Bar & Grill.

"They were talking and quite relaxed, just enjoying the night out," the owner reportedly told the website.

If that is not enough evidence of a relationship, perhaps their alleged quickie is. According to Hollywood Life, Drake and Rihanna's five-hour-long dinner and dancing date included a stop in the men's room. Rihanna reportedly followed Drake into the bathroom and kicked another guy out.

"Drake walks out looking pretty pleased with himself, and though you can't see it in the clip, we presume RiRi made her exit shortly soon after," Hollywood Life reports.

The alleged couple's naughty behavior may be why Drake is so happy these days.

"He's in the best mood he's been in a long time," a source told TMZ.

Check out the video that claims to show Rihanna and Drake's risqué behavior at Zouk Tea Bar & Grill below:

Although everyone and their mother seems to believe differently, Drake recently told Rolling Stone that he and Rihanna are just friends.

"She's the ultimate fantasy," he said. "I mean, I think about it. Like, 'Man, that would be good.' We have fun together, she's cool and shit. But we're just friends. That's my dog for life."

Follow Scharon Harding on Twitter: @SH____4.

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