Describe your ideal in-laws. What would your perfect mother-in-law be like?
This question is difficult and quite personal. But all exercises are designed to help you practice English. When faced with such questions try not to think about what others will say and focus more on how you could answer the question. For example you could say, "I am not sure what my perfect mother-in-law would be like. However I do treat people with the respect I expect from them. I would also like her to be supportive to my relationship with her son and the decisions we make." This is a generalistic answer but contains enough to provide this question with a complex and 5* answer. I hope this helps. :)