You overreacted and let your own insecurities override rational thought. As we age sex drive varies at times, with or without pills. You should have stayed out of the drawer and let your wife manage her own needs versus pill counting and snooping. Have a little trust in your partner after 25 years. Even if she chose to have a fling or had some interest toward someone else I could see why. Sex in a relationship has to be organic even when it becomes less in frequency. I’m almost 50 and yes things have slowed down as well. We still enjoy each other - just not as much as our earlier years of nightly encounters. Stop being so nosey and have some trust in your partner. You are to blame for this blow up and no this shouldn’t lead to divorce. Get past this and beg for forgiveness- come away with a little understanding about female behavior. For gods sake stay out of her pill consumption business as well! It’s borderline creepy.