Death Of a Salesman scene Willy's Affair

In this scene Biff has come to the realization that Willy is not really the person he thought he was. He now sees that he cant confide in his father for help anymore because he is a fake and can no longer look up to and respect him the same way as before. Biff is very hurt to see that his father is having an affair with another woman, and as if he has not disrespected his mother enough he even gave the woman his mother's stockings. I think that willy is having this flash back because it is an indecent that really affects him and the relationship he once had with his son. i believe that it is one of the things from Willy's past which he regrets and is a constant bother and reminder to him because he wished things had played out differently back then but the reality keeps hitting him that there is actually nothing that he can do about the situation