Just idea (i know another one!!) would it be worth pointing her in the direction of this site. It may put her mind at rest to see how common it is...
i would imagine that once you have this party it will make more people want to attend another one especially when everyone hears how much fun it...
Just one little point, is it possible that seeing you in "that device" adds to the guilt that she could already be feeling, as it brings it home...