Thinking about buying my mom a shotgun strictly for home defense. She's not much of a gun person. She's not against them, just limited experience in recent years using them. She's small, about 5'4" at the most. No more than 150 lbs. Because of her limited experience recently, and small size, I'm thinking maybe a 20ga youth model side by side? Honestly I really don't know much about shotguns. I don't know much about chokes, lengths of pull, etc. This will be a gift so taking her to a gun store and trying some out is basically out of the question. Thoughts? Mostly I'm concerned with the size of the gun and the design. Is side by side not the best choice? I'm going for simplicity and ease of use. I doubt she will practice much with it. So I want something she can intuitively pick up and know how to use. I'm thinking 20ga for recoil reduction considering her small size. Is there anything I'm missing?