That sounds like something from CMM at KS Archive. With over 250 stories it's hard to find the right one quickly. Did Kirk get to be a leader because he was Spock Prime's heir and did Spock step down as heir to is clan in favour of his father's new baby but Kirk & Spock's child ended up an heir through Kirk?
Clan Family and Thyla by CMM seems close but I think What To Expect When You're Expecting--A Pointy-eared Baby by CMM might be the one you are looking for.
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Date: 2013-10-31 01:53 am (UTC)Did Kirk get to be a leader because he was Spock Prime's heir and did Spock step down as heir to is clan in favour of his father's new baby but Kirk & Spock's child ended up an heir through Kirk?
Clan Family and Thyla by CMM seems close
but I think What To Expect When You're Expecting--A Pointy-eared Baby by CMM might be the one you are looking for.