sounds like y'all have a very healthy and mature relationship.
You are correct. Trust doesn't mean you can't make a mistake.
However real trust is something certain or certain to the point where you rely on it. You trust your money and savings are in a bank that's not going to lock the door tomorrow and run off with your money.
You likely lay your head down on your pillow and go to bed everything trusting your woman isn't having some secret relationship or betraying you in any way.
Some things are hard truths. It's true that I've never done crack, and I have no interest in doing crack, therefore if I'm ever in a compromising situation where I'm around a bunch of people using crack I'm not likely to cave into peer pressure and take a hit of crack.
If I were in situation where twice a week for 3 months I'm around crackheads smoking crack I can't tell you with extreme confidence im not going to give in and take a hit of crack.
But then again, I know myself. I can say with extreme confidence I know my spouse wouldn't smoke crack, or engage in consentual intercourse with another man regardless of the circumstance. But it takes a while to get to that point in a relationship and I have to respect that not everyone is there or even gets there.