They’ve been in the midst of romantic bliss since they got back together, but last night (November 17) Paris Hilton and Doug Reinhardt had quite the blow out.

According to a report, the “Simple Life” starlet and her handsome boyfriend were observed screaming and shoving each other in Hilton’s driveway, with police arriving on the scene and chatting with Paris.

Prior to that, Paris and Doug spent the evening out at the Villa Lounge in West Hollywood, though it looked like there was trouble in paradise as they made their exit.

Earlier in the day, Miss Hilton and Mr. Reinhardt were joined by Paris’ mother Kathy and sister Nicky at the New Hairstyling Tools Launch Party at the Thompson Hotel in Beverly Hills.