WHAT TO WEAR
The most important thing is that you wear something that you feel comfortable in and that is you. A few things to avoid would be loud patterns or prints and logos as they can look really distracting in photos.
You will move around during the photo shoot so make sure your clothes aren't super restricting.
If you have any clothing or accessories that can show movement by catching wind, it can look really cool.
Think in terms of tones: blue tones, earth tones, neutrals or pastels. Neutral tones and earthy tones are always a win in photographs. This can be any colour in a muted tone such as forest green, burnt orange, mustard yellow etc. Avoid bright fluorescent colours.
Textures are also beautiful such as lace, denim and knits. They add depth and richness to images.
HAIR & MAKE-UP
Whatever will make you feel best, do that. Whatever you normally do is fine, you want to look like you.
FAKE TAN CAUTION
Please be careful with fake tan, if you really feel like you need one, make sure it is as light and natural as possible. Fake tan comes out quite orange in photos and does not go well with your partners skin (and can look patchy on hands).
IN HOME SESSIONS
In home sessions can be all of the above but can also mean a little less clothing. The images can be a lot more intimate with a bit more skin showing. This can be anything from shorts, sweaters and jeans to a sweater with undies, jeans and shirtless for the boys! Whatever is you and you are comfortable with and want your photos to be. It can also be less an intimate feel and more of a "loungey" casual vibe or anything really that you have in mind!