The Family Stone(2005)
Meredith Stone is a fancy and successful Manhattan executive whose conservative nature contradicts that of her boyfriend Everett and his liberal family. Feeling like an outsider by her family she and her sister Julie opt to spend Christmas at the local hotel. Julie and Everett soon find themselves attracted to each other. In a last attempt to earn Everett's love Meredith decides to give him the family heirloom, a ring that belonged to her great grandmother and is currently in the hands on mother Sybil, a breast cancer survivor facing a recurrence of the disease, and originally refused to let Everett have the ring.
Personally I hate this movie but it has its fans.