After having an awkward Thanksgiving dinner with his family in London, Robert Pattinson told his The Twilight Saga: Breaking Dawn – Part 2 co-star/supposed girlfriend, Kristen Stewart, it would be best if they celebrated Christmas separately. Earlier this year, Stewart was caught having an affair with her Snow White & the Huntsman director Rupert Sanders. Although Rob seems to have forgiven Kristen, it has been a rocky road since then and it wasn’t until last month that Robert’s sisters — Victoria, 29, and Lizzy, 27 — reportedly forgave Stewart for her infidelities. However, a source close to the couple says that the “meal on Thanksgiving…was nerve racking for Kristen,” adding that Stewart “felt very uncomfortable and Rob’s sisters couldn’t be completely welcoming.” ~Brandon Bastaldo