Reception seating for a not so picture perfect family

Hey everyone, my fiancé and I are planning our wedding, but in these early discussions about the day, we find ourselves totally stumped when it comes to the reception seating.


My fiancé and I are planning a small (30-40) wedding, it’ll be a pretty casual event, and we’ll be forgoing a lot of the traditional things (no bridal party, no garter, no mother/son or father/daughter dance, you get the idea). One thing we both really want is long rectangular tables to sit amongst our guests at.
Here’s the issue, my fiancé does not want to sit next to his parents (specifically his mother), I also do not want to sit next to my mother but would like my dad and his partner to be close by. Now, we realize that this would be mostly avoided by having a bridal party as a buffer, or having a sweethearts table, but that’s just not what we want so we need to get creative and are hoping for some advice! Now the details are not important, but my parents are not technically together. My dad has had a partner for nearly 10 years (who I love and adore), and my mom is mostly single. Frankly, it’s not my relationship, nor my business to be involved in either of their love lives, if they’re happy, then I’m happy. The thing is though, they are not divorced, and won’t be getting a divorce. They are also not at all public about their arrangement with even their closest family and friends. Now I know that’s not everyone’s cup of tea, but it’s my life, and like I said, not my business.
But now the question is, how do we arrange this table with the given situation? Basically, fiancé can’t sit next to mom/dad, I can’t sit next to mom, mom can’t sit next to dads partner, but I want dad and partner to be close to me. Any advice would be greatly appreciated. We’re not traditional people, so creativity is encouraged! Thanks for hearing me out, and I hope to hear from folks soon! Thank you!