And, even if your sister received 7 ballots and not just ballot requests ( received 5 but voted early in person instead) she would have been arrested for voting 7 times if she (or anyone else) voted that many times. Actually, in most states they keep the last ballot to arrive from a voter and toss the rest. They keep track of who has voted and who has not. They are not going to accept and count multiple ballots from one person.