Not defending this shit, but can we take small solace in that a chaperone was around until she was of sound mind via maturity to make bagel's consent decisions?
(This doesn't account for societal or social pressure, which must have been massive)
If all your going by is the information here, that sounds nice, which is probably why they did it. How they 'met' Is Elvis had his people looking for young women for him to be with, they picked her out from a public place and got to work grooming her and her parents to let Elvis take her. The more you look into it, the more you hear her taking about what happened to her, you get a real picture of her being kidnapped. He was VERY controlling, she was often under lock and key. If he wasn't Elvis he'd just be a kidnapper and child rapist.