I had a feeling this would be a problem and I was right!
The ILs got a hot tub a couple months ago. We avoided going over there the first few weeks because we knew they would want us to use it. I have read it's not a good idea for men to use hot tubs when TTC because it can kill off their sperm and leave them pretty much infertile for up to 3 months because it affects quality and quantity of mature and immature sperm. There is no way I want to risk that and DH understands, but it has been really hard the last few visits for him to avoid going in. The first time he found work to do around the house so that he couldn't and then this last time his mom got a suit out for him and told him he had to go in or his dad's feelings would be hurt.

He said no because we didn't want to stay too much longer. Well, now we're going to be over there again this Thursday because his sister will be up from AZ visiting and again next week for Thanksgiving and we'll be staying overnight at least one night. I don't know what to do because I know that both times he will get serious pressure to go in and they are the type of people who will get upset and want to know why if he refuses to use the stupid hot tub. We don't want them to know we're TTC, what are we supposed to do? I would say it's not that big of a deal for him to go in for a little while, but I'm already so worried about the fact that he works outside and is wearing a bunch of layers to keep warm, I'm afraid that's having an effect too.
Any ideas?