That is an issue I have with the Glock, M&P and XD. The trigger safety is a little too easy to disengage. Good firearm safety is always important, but the bang switch on these guns are ...
And that is where her fear comes from. I "modified" her purse in such a way that she has a pocked with a mounted Thumb Drive Holster in there, so something hooking the bang switch isn't really a concern. I don't have anything more than a decocker on either of my main pistols, but I carry IWB and am just simply more comfortable. I think in the end I need to convince her to carry on her body. I think that would alleviate the fear of hooking the trigger.
I've also got us signed up for another pistol class in a few weeks, so maybe more training will help too. Gonna be a good shooting year! I'm signed up for 2 sniper competitions, 2 pistol classes, 2 carbine classes, and a shotgun class, and it's only March!