Your best recourse is to get your wife to sit and chat with you whilst you are loading....after a wee bit she will be more comfortable with the process.
Do NOT tell her what will be, do NOT badger her, do NOT under any circumstance allow any type of debate where you have to cajole, defend or whinge to get your way, if she gets her back up......you are stuffed.
DO include your wife by chatting to her about mundane things (that are of interest to her) whilst you load, if this has to be at another venue at the start, so be it.
Just remember, familiarity does breed acceptance.....or at the very least, tolerance.
You have to be quietly sneaky in your approach, unless of course, you do not care if you upset her, in which case by all means feel free to blunder in kicking with both boots....then look about for a new wife.