It just occurred to me that this could be the other way around
By the law of averages, a very short woman is more likely to give birth to a daughter who will be taller than her. On the other hand, Iowa is BIGGER in almost every physical feature. If Shimakaze is actually full grown that would mean the activation of rare recessive genetics to make Iowa not inherit her mother's petite frame.
The idea of it reminds me of those motherly Houshou and way-too-big Yamato pairings, which I find super cute, so you get a good vote.