I am in the same situation. My score is 430 and I can add my Girlfriend IELTS but it will take her some time to get high score (her first language is Italian). So I decided to wait. I know the score will drop to 430's - 420's. Be patient. Of course, if you still have the chance to add points to your current score then do it.
My advice...let your husband do the IELTS and at the same time apply to express entry with your current score (432)...which you already did...If you get invited for ITA then great, if not...then at least you will have your husband IELTS score and then you can add it to your CRS 432 score in May/June 2018. Also, you never know...you might fit the nomination requirements of one of Canada's provinces.
All the best