She should NOT be fed weekly. Feed no more than every 10 days to 2 weeks. Snakes in the middle of digestion don't have enough enzymes to handle a second item thrown in before they finish the initial meal. Most throw it up, but obviously she didn't or couldn't. She also shouldn't be fed if you still see a lump from the last meal. Somehow you have to get this thru their heads, I know this isn't your snake, so good luck.
She has only one hide? or two? (< 1-warm & 1-cool) It's not clear what temps you're referring to. Which hide is she "typically always in..."???
And fyi- my corn snakes use their warm hides (rarely in summer, more in winter), but most often prefer the unheated ones, & my house is 78-79* ambient in summer & 70* in winter.