I bet that he has been sending her money during their on-line "dating" relationship. Now he wanted to actually consummate the relationship by something more. . . er, intimate than money. Ain't gonna happen.
His photos he was sending her probably showed that he was six foot six, 180, and handsome as a movie star, but the man who showed up was Five foot five, 280, and looked like a hobo. . . and she had a bat of buyers remorse.
You are probably right. There are some real nuts out there.