A is the tallest among the four.

This implies A is male. Both the women are shorter than their respective husbands.

This indicates that B and C are the women, and they are married to A and D, respectively. C is taller than B.

This means C is taller than B. D is B’s brother.

This confirms that D is male and B's brother.

Now, let's evaluate each statement:

A. All four have family ties. This is correct. A and B are married, and C and D are married. Additionally, D is B's brother.

B. B is the shortest among the four. This is correct. Since C is taller than B, and A is the tallest, B is the shortest.

C. C is taller than D. This is incorrect. Since C is taller than B, and B is shorter than D (because both women are shorter than their husbands), it follows that D is taller than C.

D. A is B’s husband.

This is correct. Therefore, the incorrect statement is C. C is taller than D.