Why does Spock not mention Michael?

Could you elaborate on why it seems odd that Spock doesn't mention Michael in the given context? Are we missing some crucial details about their relationship or previous interactions? Is there a specific reason why Spock's silence on the matter stands out as noteworthy? Perhaps there's a deeper meaning behind his omission that we haven't yet uncovered. It would be helpful to know more about the overall narrative and the characters involved to better understand why this lack of mention is significant.