Here we get into the problem of definitions. Relationships are complex in your view people can be monogamous but have foursomes with sex workers - I would call that 'monogamish' which is a type of ENM.
Also seems to be Netav's view. I prefer to think of SH as someone who wants a nesting partner because he has a strong desire for home and hearth. And some fun at the local druid grove if Tav is okay with it. I think the FR equivalent of Saturnalia is mid-winter fest and something tell me SH will want to attend.
Open monogamy is a type of relationship that has its roots in traditional monogamy, but with a twist. In a traditional monogamous relationship, both partners agree to be exclusive and committed to each other. There’s no room for any type of romantic or sexual relationship with anyone else.
However, in an open monogamous relationship, both partners agree to be committed to each other while allowing for a level of openness. This means that both partners are open to the possibility of having romantic or sexual relationships with other people, but only within certain boundaries.
These boundaries can vary from couple to couple and can include rules such as always using protection, not developing emotional attachments to other partners, or only engaging in sexual activities with others together as a couple. Open monogamy requires a high level of communication and trust between partners to ensure that both parties feel comfortable and respected in the relationship.