Are Paris Hilton and Doug Reinhardt secretly engaged? The hotel heiress has made no secret about wanting to marry the former Hills regular, but she took it to another level this past weekend while accepting an award for her charity work... "I'd like to thank my future sister-in-law Casey [Reinhardt]," we're told Ms. Hilton said from the podium at the Hearts for Hope benefit in L.A. Doug wasn't at the event, but both his sister and mom were, and they were sitting at Hilton's table. What do you think? Are they engaged? How long do you think their marriage will last?
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