Serve Disagreement

Mei serves a first serve to the receiver, and the receiver's partner calls a clearly “in” ball “out.” The receiver returns the ball, and Mei tries to return it but hits it into the net. Mei says that her team gets the point since her opponents disagreed on whether the serve was in or out.

Is this right?

Yes. Mei’s team gets the point because when partners disagree on a call, they should give their opponents the call that most benefits them.

No, Mei should serve a second serve since the serve was called out.

No, since Mei attempted to return the ball, the ball was in play and Mei’s opponent gets the point.

I’m not sure