Need some help with avoiding an argument or offending my DM, if possible.
Brief background is that we have quite a strained relationship, argue when we spend much time together. Issues between us run deep! She tends to forget how nasty our arguments are or blames me for them saying well if you didn't do XYZ we wouldn't argue so much!
We have a family friends wedding coming up. It will be abroad. DM (she's single and won't be invited to the wedding with a plus 1) has assumed that she and I will stay together, along with my husband and children. She said 'I'll start looking for places for us to stay'. I really don't want to stay with her as we'll inevitably end up arguing every day and it will ruin what should be a lovely occasion and what could be a nice little holiday in the sun.
She can be very insecure and will be hurt and offended if I said that to her. How can I approach this?