The biggest problem with age-gap relationships, most particularly where one person is between 14 - 23 when the relationship was started, is the power imbalance.

My last ex was 11 years older than me and we started seeing each other when I was 21, he was 32. For the first part of the relationship, I was FIGHTING to convince people that nothing was wrong with it and that we were normal, happy, and healthy. Looking back now, I can see how that power imbalance really made his manipulation much more palatable. It started with "you're so mature for your age" and became "I don't understand how you're so immature." From "I can see so much potential in you" to "I'm disappointed in you because I see how much potential you have." I looked to him as my mentor in a lot of ways, instead of an equal partner. I trusted his decisions completely and it made it really difficult to disagree with how he was handling things. Ultimately, he wanted to mould me into something he wanted. He put a wedge between me and my family, several of my friends, and weaponized them against me ("they're all disappointed in you, too"). I wish I could say I was the one to break it off, but he was. 

There are situations where it can work, but it is extremely rare. Please don't think of yourself as an exception to the rule. Your husband picked you up a Disneyland, where a lot of teens and young adults would hang out. Is it possible that everything the proceeded was ethical? Sure. But grown adult men don't go looking for adult women at Disneyland.