Camille's vs Mrs Costa reaction (goof??)

Camille realises something is not right when she sees her twin sister has aged while she is still the same. She is terrified and screams, which is understandable because when she left home "this morning" Lena was her same age.

Mr Costa (the elderly man who jumps off the dam to his death) is in his seventies. In his house there's a picture of him and his wife in their thirties. When she comes back, she's in her thirties so we know she died young. She interacts with her husband, who is now 40 years older than when last she saw him... and does not react in any way? I understand Costa's is not a major story within the plot, but she sits there eating, smiling at him as if nothing has happened.

I think it's a major goof (unless someone has any thoughts or saw something I miss?).