I think you misunderstood parent. There is a natural order on the tree of life starting in the first living organism (the root node) and ending in organisms that are still around (the leaf nodes).

With 'last' parent meant 'last with respect to that order', not necessarily in the sense of 'older' and 'newer' (which correlates with this order, as you pointed out).

> Who said that? There are tons of newer than us leafs (organisms that evolved after we did).

I meant leaf nodes in the sense of the tree data structure, so I think we are saying exactly the same thing.

> If you mean "but there are no futher evolved human ancestors", that's not an exception: that's the same case with almost all current animals.

Yes that's exactly what I meant with the second part of my comment.