answered:
great news! that just straight-up doesn’t happen.
tarantulas can live for well over a decade, and female tarantulas can expect to breed multiple times before they finally kick it! and since there’s always the expectation of there going to be a new clutch of eggs in the nest every year, there’s no benefit in getting rid of the frogs that will keep those eggs safe.
a female columbian lesserblack tarantula will treasure and protect her frogs until the day she dies, and then those frogs will go into the care of whichever of her daughters inherits her burrow! it’s an eternal cycle. a cycle of frog.