She could be crying for a number of reasons: 1) they are split and she's angry about it 2) giving the DP is emotional for her 3) the autopsy photos of Travis
I bet it doesn't happen very often that a juror goes back to deliberate and discovers about herself that she literally just can't bear the responsibility of imposing the DP.
IF that's what is happening here, though, then I think it is unreasonable to force her to continue if she wants out. I would hope that IF the rest of the jury can't complete the job because of her that they communicate that to JSS and that JSS replaces her, for her own sake.
I don't feel judgemental about her, I feel concern for her.