My name is [BRUTUS] and my name means [HEAVY] so with a [HEAVY] heart I'll guide this dagger Into the heart of my enemy

Something about having absolutely no choice in who you marry. About being literally forced by the law to spill blood - to accept this stranger as your husband over a man you truly care for or accept the fact that the man you love might die because you put him in danger. Something about risking becoming the wife of a man you've never even seen before a few minutes prior because you know anything would be better than putting your beloved in harm's way. Something about the trust inherent in that decision and in the way she speaks of it after. Truthfully, T'Pring doesn't know the captain and she doesn't know Spock. Either one of them could have taken her as their wife but she does know Stonn. She knows that Stonn will remain by her side no matter what. They made a plan together. They have an agreement which T'Pring believes will be upheld even though the plan changed with the arrival of Kirk. Stonn will always be there, always, and Stonn will be hers. Something about the language used around T'Pring: Ownership, subservience, non-personhood. T'Pring is an object that Spock can win. She cannot reject him, she has no say in the matter other than having Stonn 'claim' her instead. Even when Spock leaves after being very clearly rejected by T'Pring he says "Stonn, she is yours." as if despite her clear rejection he still owns her and is must formally 'give' her to Stonn. But the language T'Pring uses around Stonn is a break from that: "There was Stonn who wanted very much to be my consort, and I wanted him." Stonn who wanted very much to be HER consort and she WANTED him. The language here is very particular - It's not, for example: "Stonn wanted me to be his wife" - he is HERS. And she WANTS him. There's a mutual affection there and a strong trust - a trust which seems to be well founded since Stonn (though silent) stands by her side at the end of the episode. <- That might seem small but if Spock would reject her for 'daring to challenge' (again, the language is not 'because I don't want you' but more of an implied disgust at her having the AUDACITY to reject him) then it's not a stretch to assume that it'd be considered an insult in the TOS Vulcan society to NOT choose Stonn as her champion after a prior agreement. Anyway T'Pring was a woman in an impossible situation within a society which saw her as more of an object than a person and she wanted Stonn and Stonn wanted to be hers and she trusted that he would understand if she had to publicly pick someone else to ensure his life would be spared and he did understand.