Not referring to this case, just making the wider point. Depends what the defence and/or experts put forward as mitigating circumstances. e.g. you could have a wife who's endured years of abuse at the hands of her husband and she snaps one day when he's beating her up, stabbing him multiple times in a fit of rage, killing him. Although she did the act, part of the defence would be it wasn't premeditated and her actions were the result of years of abuse, all coming out in those few seconds of rage, with no preplanned thought or intent of killing her husband.
I'll say again, I'm not referring to this case, just making the wider point.