one of my brother's supposed fire brothers. >> reporter: what's your advice to this guy, this firefighter? >> watch your back, you know. the last two guys involved with danielle, one's dead, one's in prison. >> reporter: as for dianne, she's now left to reflect on a life with sam that could have been. did you two talk about marriage? >> yes. >> reporter: and was that in the cards? >> oh, absolutely. >> reporter: did you ever feel like i'm being punished for having this affair? >> oh, yes. i might have said those exact words myself. >> reporter: it all started in a club with an innocent conversation. >> mm-hmm. >> reporter: was it all worth it? falling in love with sam? >> i would never change having met sam. >> reporter: was he the one? >> he was the one. without a doubt. he still is the one.