I think it depends on your own comfort level, if you are okay that she sits at the front.
You also need to see your helper’s personality. Some helpers might take it for granted (arrogant) while some will feel awkward sitting at the front.
For me, my helper will sit together with me and baby at the back if I want to be with baby. We will leave the front seat empty. Both of us are skinny so we still have comfortable allowance between us.