Watch Murder In-Law (2019) HD Full Movie Free on SolarMovie. Watch Murder In-Law (2019) online free. Allison is married to a mama's boy. Her mother-in-law doesn't take it well when, due to Allison's pr...Allison is married to a mama's boy. Her mother-in-law doesn't take it well when, due to Allison's promotion, her son and granddaughter are moving to NYC. She schemes - starting with murder.