You will notice, though, that 'vedo' is not appropriate after 'lei', and we must conclude the phrase is 'le vedo tutte'
How would you write "I see all" ( as in everything) ? With the infinite see? As in: Io(mi) vedere tutti. ?
That would be "(io) vedo tutto". Tutto can be both adjective and pronoun (and even noun); in the masculine singular the pronoun means "everything", in the plural "tutti" means "everyone", "everybody".