and each time I went on how the woman felt. So, I focused on her first and gauged my reactions on her. I think that is a fun and safe bet because in both situations she became way more relaxed and her boyfriend enjoyed watching, then eventually joined in.
Couples usually ask for longer dates, I've noticed, 2+ hours. It makes it so you have more time to talk, open some wine, mood is lightened, etc
With many couple scenarios, the female half says she is bisexual or bi-curious and so they are looking for girl-girl play with the male half having limited to full participation.
Sometimes, she is not up for any girl-girl action; the experience is all about him being the center of both ladies' attention.
They might have a very specific fantasy in mind. It may be more voyeuristic ratherr than everyone naked & writhing on the bed together.
No matter what they seek, the boundaries/limits vary from couple to couple and I personally feel it's best if you can find a safe, comfortable way to discuss this before playtime. 
Communication prior to the act would be very important to me, personally, and this is especially trueif they've never had an FMF or similar activity.
But other ladies are able to let things flow and just figure out everyone's comfort level in a more organic way.
There is no right or wrong here; there is only what is right for YOU. 
If you want to make yourself available to couples, the first thing to do is figure out your OWN comfort level and boundaries.
I used to see couples, but after enough experiences turned out less-than-great I had to admit the only common denominator in each situation was ME. I am just not good at it. So I no longer offer this.
xoxooxxoxoxoxooxxoxoxoxoxoxooxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxxoo
Nooner: A sexual encounter at lunch hour; especially one that is illicit
