JMO, I think the emphasis on the long-term, loving comittment of the victims is to build compassion for them, preventing any jury members who are outraged by infidelity from, therefore, 'excusing' the defendent's actions.Court hears details of Victorian camper's last radio call on night of alleged murder
The daughter of Carol Clay tells a Victorian court her mother had a "very loving and caring" relationship with Russell Hill, with whom she was allegedly murdered during a camping trip in 2020.www.abc.net.au
Victorian campers Carol Clay and Russell Hill had 'loving, caring' relationship, murder trial of Greg Lynn hears
JMO, but RH's spouse would have been briefed and well-prepared for this strategy, she wouldn't be hearing it for the first time.
Also, just my opinion, but if RH complained a lot about his wife, that was possibly to stave off his own feelings of guilt. If he hadn't felt guilty, he wouldn't be dwelling on her in his thoughts. Perhaps his spouse knows that, too, but it's pretty subtle for most people.
JMO