I am currently pregnant with my third child and it has just dawned on us that we can't fit three car seats in the back. Luckily, our eldest is tall and after looking into it we realised she no longer legally needs a car seat so will fit inbetween the two car seats at the back. However, on thinking about this further I am concerned about the safety of this. If we were unfortunate to have a side impact accident would the other two car seats cause her harm?