Questions about s? If a girl is asked...?

to take part in a with a married couple is it umed that she is being asked to be ually intimate with the woman also? A couple that I know has kind of asked me if I would like to go away for the weekend and they have subtly implied that they are inviting me for , not just to tag along. I am curious but not sure if I am interested. They are both attractive but I have never been done anything like this before. I could use an opinion if there are ladies out there that have done this before. Thanx.