Was Wilmer Valderrama Demi Lovato’s Rebound or Cause of Her Break-up?

Demi Lovato started dating Wilmer Valderrama and calling him her boyfriend to friends almost immediately after her break-up with Joe Jonas back in May, Page Six is reporting. Which begs the question was Valderrama a quick rebound or the cause of the break-up?  The two met while filming a PSA for Chile around that time. Lovato was ONLY 17 at the time and Valderrama 30!? Either way Valderrama comes off like a shark circling the tank on this one.