Watch Killer in Law (2018) HD Full Movie Free on solarmovie.do. Watch Killer in Law (2018) online free. Melissa, a happily-married woman with an eight-year-old daughter, invites her husband's mother to li...Melissa, a happily-married woman with an eight-year-old daughter, invites her husband's mother to live with them, only to realize that Grandma is unhinged and wants to kidnap Melissa's daughter to replace her own dead child.