How do you answer?

well this wasnt an aunty but a good friend of mine who knew about my relationship to my sil and how things have been going between us. the context she asked about sil was actually quiet ok as we were speaking of kids and I mentioned sil’s kid so my friend just asked 'btw how is this with your sil..and then she asked the question that I m not allowed to speak about. I went totally quiet and said and she sensed that something was wrong so she asked if everything was ok …

and thats y I started thinking that since it is something very obvious for many ppl they will def ask me in the coming time about it so I should prepare myself with an anwser..