PS is not set "in Medieval Times" but fantasy-themed with some vague "antique" flavor. In "Medieval Times" there were no octarchs, arenas, polytheism or ulbernauts, let alone krans or enkidukai or a massive underground world. Also in many societies some forms of homosexual marriage were allowed in ancient times, although were usually restricted to transgender males who were treated (more or less) as females (female homosexuality has almost always been "invisible").

Anyhow if Yliakum can be democratic polity in which the officers are (theoretically) elected and where women can be soldiers and vigesimi, I see absolutely no reason to exert discrimination on the issue of same-sex marriage, which nowadays is pretty much standard, just as female emancipation or racial equality is.

As for having children: children and pregnancy are utterly absent in the world of Yliakum, so whatever. The only consideration should be love.