Do you have a feeding chart so you know how far apart the regurges have been happening?
After 1 regurge you want to wait 2 weeks before offering again to let their stomach settle down and the acids they need to digest food build back up. Also I would recommend feeding a smaller sized prey item and gradually work them back up to the proper sized prey item.
If he wasn't giving her a decent amount of time to recover that could be what is causing the continued regurges which can lead to very severe health issues.
Make sure you husbandry is spot on, give her atleast a week to settle in(depending on how long it has been since her last regurge) and then try offering her a small meal.