Final answer:
The most suitable nursing response is to acknowledge the mother's concerns regarding her relationship without dismissal, allowing for open communication and support.
Step-by-step explanation:
In response to the student's question, the most appropriate response by the nurse would be, "You seem to be concerned that your relationship with your husband might change." This empathetic statement does not dismiss the mother's fears and opens the door for further discussion about her concerns, which is essential in providing holistic care. The nurse can then encourage the mother to express her feelings and address the psychological impact that this situation may have on her, which is an integral part of the supportive care she needs during this stressful time.