If it were me, I would give them a EDD that is much later than what it is. You really don't need the hassle and then in all likelyhood, you tell them your true EDD, they turn up, baby is a no-show for 2 weeks and then they have to go home and miss out anyway. Much better if you can do that, or tell them you think it will be better to come after bubs is here to guarantee that they can have a proper visit and not miss out kwim?