I do agree. I have read other comments since I made my last one, and I do see that shooting him in the back outside the house is a major strike against her, although I tend to agree with the crime of passion aspect. But an emotion-driven warning to her daughter about “putting a hole in his ass” does not sound like classic premeditation, the requirement for first degree, since she only (allegedly) said “a boy”, not which boy her daughter might have been contemplating some misbehavior with. So “it wasn't personal—just business.” Mama bidness.
She should have said, “It’s comin’ right for us!”