Okay - I do have something to contribute... but not necessarily about the age differences...
I remember not too long ago - when I was still married to the JW-wifey, her telling me a story about a JW fella from Australia. His wife died - but before she passed on, she told him that he should marry her 'best friend' after her death.
Well... sure enough, she passed on, and he looked up her best friend - who just happened to live here in the states. He came over here - told her the story - and then proposed to her. She accepted - and they got married soon after.
Now - these people were in their mid-40's. Not teens. Not in their 20's. But, old enough to know better.
Anyway - they had to stay here in the states for about 6 months - so that she could get the paperwork squared away - to be able to go with him back to Australia. (Turns out, she was Indian - India)
They finally left, and got back to Australia. Word came back later - through an independant source living in Australia - once she got there (Adelaide, S.A.), she didn't like it - and was longing to return to the states. But couldn't. She was now married. She now had to 'obey' her new husband.
I think that sometimes these people create their own hell.
Regards,
Jim TX