Ending the game (Last Day of June)

As I understand it,the main character has the ability to time travel and he in the end gets to place Joon in the car,and June sits in the driver's seat.Then an accident occurs because of the storm and the main character dies,but before that, on a white background, he says goodbye to June.The image is then replaced in the family plot where June was hugging the tombstone of her husband and she was pregnant.After the credits she is sitting on the bridge in front of the lake and it runs already grown-up son, and she embraces him.
That is the question:if her husband gave his life for June(since the accident couldn't be avoided),why in the diary on the last page(which was painted her husband in a Superman costume) was the inscription Accept.Then it turns out,June could not survive.But we see the opposite:her husband died,and she had a baby and survived.So she stayed alive or is it again a dream of her husband?