Kaufman met Australian-American actress Poppy Montgomery in 2005 in Mexico while working on the independent film Between and in 2010, they worked together again in the TV movie Lying to Be Perfect. Montgomery was then starring as FBI agent Samantha Spade on the CBSmystery dramaWithout a Trace. Kaufman began a recurring role, making his first appearance in March 2007 with season 5: episode 19 titled "At Rest" as Brian Donovan, Samantha's love interest for the rest of the series. In June 2007, Montgomery announced her pregnancy with Kaufman, which was written into the sixth season. On December 23, 2007, Montgomery gave birth to their son Jackson Phillip Deveraux Montgomery Kaufman in Los Angeles. It was reported on October 10, 2011, through Life & Style, that Kaufman and Montgomery broke up due to the distance between them when working. Kaufman resides in Los Angeles.