Need help with a TOS fic

[magicalstarsky.livejournal.com]

Hi ya all!
I've been pulling my hairs for two days straight and still could not find the fic I read about 2 months ago. The title and author escaped me.
I remember the content though
Kirk and Spock was legally bonded before the first PonFarr and Spock was away for a scientific project at a starbase. Kirk visited Spock's relative when the son was in PonFarr and consequently attacked Kirk in his heated fever for his mate. The wife returned and very recluctanly went serve her bondmate. The result has always been harsh from PonFarr. Kirk was afraid Spock turned out to be like that.
Somehow Kirk found a reason to visit Spock on time of Spock's PonFarr but he chose to participate willingly, actually enjoyed the sex. The next day they showed up in a meal with everyone gaping at Kirk for not being severly injured. Spock's uncle approach him and asked him to repair some mechanics for his ship. His daughter who called Kirk "kinsman" asked Kirk for advice.
That's all I can remember.
Thanks in advance