Her severance would be due to a sale. There are lots of regular employees that get severance packages when they're let go due to a sale.

What's her severance in proportion to her annual salary along with tenure? The norm for my area/role, as an engineer, is 4 weeks per year of service. So 6 years would get me half a years salary, but you know what - it's only two weeks per year for "lesser" roles in my company such as support.