Hard isn't it. I think if these friends were as close as it seems & it means alot to your OH you should go!
Thing is you could go 2 weeks early even 2 weeks late! Even weeks ago! Just never know so until baby wants to appear I would carry on as you have been personally esspecially if as above its very good friends!
Whats the worst that can happen - you go into labour you would just have bubs in another safe enviroment. as long as bubs is healthy go for it and enjoy yourself as much as you can
People told me to spend as much time with OH as poss before baby too - wish I'd listened
