Good on you for not forcing him to climb, climbing day in day out certainly takes its toll on the mind and body.
I think being understanding and talking with him about will be beneficial to both parties.
It's encouraging to hear all the support for both Lyle and his new father/climber. Anxiety is a real thing and effects people in all kinds of unpredictable ways. Here's hoping that the climber can rediscover the love of climbing once he is better rested and life settles down a little.