The range you are looking at is six years on the low end and twenty on the high end, but where she lands within that range is almost entirely within her own control.
The six-year minimum is real and reachable. Parole eligibility in most states kicks in after the minimum is served, and a first appearance before the parole board is not automatic approval, but it is a genuine opportunity. What the board is looking for is straightforward: has she followed the rules, completed recommended programming, and demonstrated that she is not a risk to reoffend? Inmates who check those boxes consistently, stay out of disciplinary trouble, and engage with whatever educational or vocational programs the facility offers give themselves the best shot at release at or near that minimum.
The deadly weapon enhancement is already baked into the six-year floor, so that has been accounted for in sentencing. What matters now is what she does with her time inside.
To put it in perspective, six years for voluntary manslaughter is a relatively short sentence given the charge. People receive longer terms for nonviolent offenses every day. The system can be arbitrary in ways that are genuinely hard to explain. The most useful thing she can do is treat every day of programming and good behavior as a direct investment in getting to that parole hearing with the strongest possible record behind her.