Tila Tequila got busy while filming in Nashville recently -- with Nick Hogan!
"Tila and Nick spent a lot of time together both on and off the set and totally hooked up," a source close to the situation tells RadarOnline exclusively.
According to the source, Tila, 29, was robbing the cradle and didn't find out until after they'd done the deed that Hogan is nine years her junior.
"There was some major chemistry going on between them and even though they tried to hide it, everyone on the set knew what was going on," the source says.
"They were constantly together, sneaking off and being affectionate when they thought no one was looking."
Hogan, 20, and Tila were in Nashville filming for director David Keary's new flick Masterminds starring The Wire's Tray Chaney.
"There was one steamy scene they had together and even after David yelled, 'Cut', Tila and Nick just kept going at it!" the source tells RadarOnline.com.