Except 18/35 is inherently predatory. The power dynamics in that relationship are entirely skewed, no matter how you try to justify it. One person is a teenager (not even legal to drink or gamble yet!), and the other has been an adult for 17 years.

The major discrepancies in life experience, sexual experience, and financial experience (regardless of if the teenager is loaded from their parents, they don't have a 20+ year work history) create unequal foundations for a relationship. There is no possible 'innocent' way to construe a 35-year-old wanting a relationship with a teenager. None.