Let's move on to the implications of this in yoga.
This fine when done in a temple setting, and it's fine to not even be married.
As long as no one is investing their love recklessly.
It will be fine to do this when isolated because you meet no one other than your own partner and you are not getting distracted. The slippery "promiscuity" energy will be rendered harmless. It's something that just exists and there are two ways to handle it:
Avoid it or subdue it.

Mundane humans must avoid it.
It can only be handled correctly when your intent is to transform your body to higher dimensions. As you do this, you can produce more the "love" and you are not restricted to investing it into one object.

There is also a rare case where someone manages to not live in a temple and still do this right.
It's when someone loves themselves over everything else, and invests the love and devotion only in themselves. They feel no lust for other people and it doesn't matter what relations they then have. This is slightly touched on with the deity Radha, the wife (or female aspect of) Krishna. she is said to sometimes dress up as a whore to hang out outside the tavern. She is her own God and will not be touched by lust.