her brother was craig's old buddy, p.j. tucci. rideout's best friend to being craig rideout's estranged wife's boyfriend. >> yes. >> reporter: so that does not always work out so well for relationships. >> certainly not between the two of them. >> reporter: greg and laura had been close friends with p.j. and his wife, jennifer, for many years. >> all of the kids really grew up together, they would go out together. they had parties together. >> reporter: but around the same time that laura and craig's marriage was falling apart, p.j.'s wife died from liver disease. p.j. says he leaned on laura for support, and laura began confiding in p.j. . >> his best friend, his former best friend, yes. >> reporter: in a romantic relationship now? >> at first, craig did not want to believe that there was a romantic relationship going on between them, and i think, over time, it became painfully obvious that there was. >> i didn't know i was gonna fall in love with laura. but that happened over time. >> does craig know about this? >> craig sent me