I have to agree with you Starlinn. It is one thing to come out and say that you are not interested in the bi thing and just want to swap, or even to say in advance that you are only looking for a man to play with. However, to come out the way they did, invite you to your home and then basically ask you to leave so they can play with your husband is disrepectful and hurtful.
I know my husband would have done the same thing and we would have immedately left the house. We have no time fo people who are deceitful and rude. Best thing is to move on and put this behind you. There are better couples out there to deal with. In my opinon (such as it is

) their motives are irrelevant, it is their actions that speak volumes.