I can kind-of see that! It would be rather dreadful if Marshall & Christine came to the realization at vastly different times, so I'm glad in your 'verse it was concurrent. And I could definitely see McCoy proposing to Christine! Despite the poor end to his first marriage, he hopefully had a positive view of marriage in general. Mary, not so much! A long-term relationship (much less marriage) with her would be rather more fraught with peril! {grin}