Shia relatives question why Aisha (RA) was on her camel, at night, instead of sleeping when the figh

I have heard Shia relatives and people on social media question why Aisha (RA) was on her camel, at night when everyone else was sleeping, if we claim that she never intended to start a war and why she did not leave the battlefield and refuse to fight Ali (RA) like some of the other companions did. I think I do have an answer for this, but I want an answer that is accurate and backed with evidence.