Again at worst possible time! We live by beach. No one visits in winter - in summer everyone interested. However this year I will be heavily pregnant / about to be in labour / in labour. Also we will be moving house locally or recently moved. I want them to respect our space, but they are insistent - saying they will camp in garden and only stay a night or two. What would you do / say? 
Ps when do announced our pregnancy to her, sister in law simply said 'oh no'.....
Now they want to visit at a very vulnerable time and I can't seem to put them off!