It would only be rebound if he and Penny
had actually engaged in physical INTIMACY.
The Big Bang Theory Season 2, Episode 2
Just extending the INTIMACY.
The Big Bang Theory Season 1, Episode 5
instead of pressuring him to
accept INTIMACY on your terms.
The Big Bang Theory Season 7, Episode 10
details of physical INTIMACY,
bathroom habits...
The Big Bang Theory Season 10, Episode 16
...that a disinterested onlooker
might mistake for INTIMACY.
The Big Bang Theory Season 6, Episode 1