"I had no idea about the letter," she said. "On a Saturday night we would go for a dance at the local club and come for a swim in the nude and it was all innocent - it was the only thing we got up to.

Having set off at 19:30 local time (00:30 BST) on Friday, Ms Reineke and her swimming partner Lee Saudan swam 30.1 miles (48.5km) through the night. She battled through seasickness to complete the ...