I wanted to make this thread for all you people, who have partners who are therians who use this site, but are having second thoughts about joining TG yourself.
I understand that you are concerned about what exactly your partner does on Therian Guide.
While we are a private community (therianthropy is pretty personal), and there is a procedure to follow to actually join TG, we don't talk about anything particularly illicit on here. It is my wish (and I'm sure your partner's too) to assuage any fears you might have about this community.
I think the easiest way would be for you to join too. You don't have to also pretend to be a therian or something. Everyone who is willing to have some basic respect is welcome here. Even if you don't respect therians and just want to ask us if we're serious you are free to join. We'll try to answer your questions and the rest you can see for yourself.
I also understand that therianthropy can be an interest you don't share with your partner.
Therianthropy is just something that happens to some of us and therians are pretty rare, so often someone who is a therian will have a partner who is not a therian. Some therians are open about their therianthropy with their partners, while others are not.
I'm sorry if your partner didn't feel like they could trust you with something as personal as their therianthropy. It can be embarrassing and they might have been concerned that knowing would negatively impact your relationship.
Since I know some such cases, I would ask you, if possible to give it time. Your partner is still the person you've always known. I'm sure if you take the time to try and understand why they believe they are a therian, over time, you will see their therianthropy shine through in things you do together.
Therianthropy is not some new interest. It's a core part of the person and it's always been there, whether you've known about it or not.
In addition, therianthropy is not something you necessarily have to have in common with your partner. Many therians live happily with partners who are not therians. The animal aspect may or may not even play a role in daily life. For some it's completely irrelevant. For some, especially therians of domestic animals, it enhances the experience.
You don't have to worry about growing apart with your partner because of therianthropy. As mentioned, if they are a therian it's something that's always been with them.
While some therians do see value in spending time around other therians, there is obviously a big difference between being friends with someone online and being your partner. For me personally, if I befriend your partner I consider you a friendly too. I know that you're someone who's special to my friend and I respect both of you.
It's true that some therians, feel the need to socialise with others of their kind. For example for me as a wolf therian, there's social cues I get from other wolves that I don't get from family or people at work. I enjoy those cues and so I enjoy spending time with other wolf therians. How this expresses in the individual can be complicated, but at the end of the day, all wolf therians are human and you can do anything they can do. As for the actual animals, well... none of them are online.
If you are not a partner of a therian, but a parent of one, I would direct you to the page dedicated to parents of therians:
While this post is here primarily for people outside the Therian Guide community who are in this situation (the Introduction to Therianthropy forum is public), feel free to discuss what I have written about, below.