Hi Aery, welcome to the board.
Feel free to mix away. If both of you are going to be posting, it is highly recommended you create separate accounts, since you are two different people with different personalities and opinions.
If you have an issue you'd like lots of support and suggestions for, post a new thread in Poly Relationship Corner. To discuss non-poly issues, there is the Fireside. If you'd like to blog about how your poly life is going, we have a Blog section as well. You can request feedback there, but it won't be as intense as it would be in the Poly Relationship Corner.
Of course, read around a lot, read threads, blogs, follow links. Post in with your own opinions and experiences wherever you like! This is a great place to learn.
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
Mags (poly, F, 61) loving miss pixi (poly, F, 39) since January 2009, living together since 2013
Punk, 42, ex bf, manchild. I've been Punk'd!
"Master," (mono, 34), miss pixi's Dom for 2 years