Complex sentence: Sanseverino tells Adriana that she is with the "good guys" now and then reveals to her what she claims to be why she became an FBI agent: her sister's criminal boyfriend traded their TV for six handguns.
Split into simpler sentences: Sanseverino tells Adriana that she is with the good guys now and then reveals why she became an FBI agent. Her sister's criminal boyfriend traded their TV for six handguns.