Jack Nicholson's grandson Sean Nicholson was hit with a temporary restraining order by his ex-girlfriend, Elizabeth Lawlor, days after his arrest for felony domestic violence, Us Weekly can confirm. On Monday, August 11, Lawlor, 28, filed a petition seeking a temporary restraining order against Nicholson, 29. Lawlor described the days leading up to Nicholson's arrest on August 7. She said the most recent incident of alleged abuse occurred on July 23. She claimed Nicholson's mom, Jennifer, called 911 and the security guard at the apartment during the incident. Sean Nicholson.