Before DH and I married we both said we would love 3 children and a dog .
We've been married 12 years and have 4 year old twin boys.
DH is desperate for another child but I have changed my mind . I have ME and I struggle to get through most days as well as feeling incredible guilt that I can't do everything with the boys .
DH knows this . PIL know this .
Today over Sunday lunch , MIL mentioned how the boys are so grown up and she can't wait to have another newborn around.
I didn't really know what she meant and just smiled making a comment on how lovely newborns are.
DH then went out to play in the garden with the twins and FIL . Moments after they left , MIL chimes "oh I really do hope you change your mind about having a third; xxx (DH) is desperate for a third and well, you did always say you wanted three, so it's only fair ....." 
I didn't know what to say other than mumble something about things changing and me not being well doesn't help .
She then offers to help out and says she will happily watch the boys whilst I go to the gym to sort out my ME 
We are still here and I am hiding in the toilet - seething at DH!
I'm so annoyed he discussed this as it has been a crux in our marriage , especially over the last few months .
But I don't know if I'm BU - she is his mum after all ?
For what it's worth - I don't want a bloody dog either .