Thanks
@Wiebke, that is so kind and helpful. I love having the piggies indoors, it is the best thing ever; they are so much more friendly now and this has been my aim/dream every since joining this forum and reading about how lots of other people keep them. I also have a huge 6ft outdoor hutch with an attached run for summer playtime but that isn't out yet. I think MIL has quite an old fashioned view of keeping animals. I also have a pony who nearly moved with me to live near the in laws house and she was all like 'oooh i can groom her for you and look after her when you're away' - not a chance, she is a very strong Highland pony and also has not been groomed since September.

Also they had a single guinea pig when my OH and his siblings were children, it was outdoors, escaped and then eaten by something. I am completely perplexed as to how she thinks that is better than the safe and cosy existence mine live!
My OH is fairly relaxed about the piggies as he sees that it makes me happy. I also had to compromise on not having a cat as it had to be indoors as well and scratched the furniture which he did not like, so after our last foster he said no more.

(then I said well piggies indoors then). I also catch him speaking to them every time he comes into the living room! He loves them almost as much as me but sometimes doesn't remember the benefits of pets!
Your advice is very helpful, I will remember the quote 'I am not telling them how to live their life so I would appreciate the same respect from them'. That is polite yet firm. 26 piggies - wow! I am happy with just 4 at the moment! My parents are completely happy for me to do whatever I want, they don't impose rules like this even though they never really saw keeping pigs indoors as an option (although their last remaining piggie would have been on her own outdoors since her sister died, so she has moved indoors!), so I don't see why OH parents feel like they should put rules on us! Sorry, long posts, it annoys me a lot! More than when she buys us different washing powder when she visits.