I'm Doug, and I'm sorry to hear of the confusion. My goal is to provide you with excellent service today.
It is important for both husband and wife to understand that in order for one of them to take a spouse benefit, the other must file and suspend no later than April 30, 2016.
And yes, if the husband files and suspends now, the wife may immediately then file a restricted application taking ONLY a spouse benefit equal to 50% of her husband's full retirement age benefit and that will allow both of their own retirement benefits to continue to grow by 8% per year up to age 70.
However, she may never collect half of his age 70 benefit, because only the worker spouse may benefit from their own delayed retirement increase. If the wife takes a spouse benefit now, it will remain at that level for ever---or until she chooses to switch back to her own retirement benefit once it has risen in value based on that 8% annual increasing. Even if she were to do nothing until her husband reaches 70 and then applied for a spouse benefit for the first time, she would still only receive 50% of his age 66 retirement benefit.
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I wish you and yours the best this holiday season,