There are species of spiders that do eat other spiders, and not just during/after mating, so she'll be fine with it. Maybe.
It's normal between insects and in this case it's called interspecific cannibalism. Basically, spiders eat anything that smaller than themselves, including other spiders of smaller species.
Everyone's talking about spider cannibalism and all I'm thinking about is how poor Kisume probably ended up as spider chow for being 'stingy' while Yamame got away scot-free...