Weston Cage

Nicolas Cage, a week removed from his domestic violence arrest, attended the wedding of his son Weston. No word on whether or not it was an open bar.

Finally, some good news for Nic Cage -- the actor's son Weston popped the question to his ridiculously hot girlfriend Nikki Williams two weeks ago ... and they're set to get MARRIED on Sunday! Sources close to the couple tell us ... 20-year-old Weston and 22-year-old Nikki kept the engagement a…