Look folks, there are some kinky people out there that do a lot of things for kicks that the rest of us might think are disgusting. She may actually like the situation she is in and you gotta admit, it would be hard to rape a woman with one of those things on.
If she was not complaining then who are we to complain? Me and my husband have played around with this stuff and I've wore chastity belts for extended lengths of time. When he decides to let me loose the night is amazing. hehe
What I am getting at is that this could have very well been consensual and if so is none of our business. As for her age and his, well in Mexico back then I believe it was perfectly legal and even accepted in their culture...again something we should keep out big noses out of.