James Cameron cheated on his wife at the time who played Sarah Connor.
Actually at the time of the first movie his wife was Sharon Williams, he cheated on her with his Terminator producer Gale Ann Hurd (who’s a great producer), dumped her before T2 (but she has character creation co-credit so she gets a check for every T movie) and married Kathryn Bigelow, split with her and actually stayed unmarried for a while THEN finally married Sarah Connor (Linda Hamilton) for a couple of years. He’s actually been with his 5th Suzy Amis since 2000, which is kind of a miracle.