Betty Broderick 's son is trying to process his grief now that she's gone ... because, while she obviously killed his father, he also thinks of the good times. Daniel Broderick -- the son of Betty and Daniel -- tells TMZ ... obviously his relationship with his mother became complicated after she killed her ex-husband and his new wife in 1989. That said, Daniel also tries to remember the good times ... saying she was an amazing mom back in the day -- engaged, intelligent, fun and funny. Despite