You know, even if the only form of revenge she takes is finding her own happiness, I would be quite satisfied.
...this granny. First off, impressive arm strength (though based on her garb our girl has not exactly been getting good treatment or had much opportunity to live actively, since going out looking like that when she is technically the main wife would shame her husband). Second, She's worse than the sister. No remorse. Third, Strangulation is not clean, and it's not fast.