Travelling while in iddat

I’m on iddah at present and have been keeping to the confinement of my home as per the rules of Islam. However, my daughter has been experiencing emotional and psychological distress to my divorce as we had to pack up and leave our home in a few days and start a fresh. She is seeing a therapist at present.

My brother is going away for the weekend and suggested that I join him with my daughter going to the destination and staying in the room whilst he does activity with her. I unfortunately have to drive because he is taking his family with him and there is no space in the car. Is this allowed considering the circumstances. It’s been six weeks since my iddah and I don’t don’t want to break the rules.