WHAT IS TARA READE'S MOTIVE?

I don't believe for a moment that Joe Biden assaulted Tara Reade. But let's assume that he did. What is Tara Reade's motive?  She wants to punish Joe Biden for a brief vulgar incident that happened 27 years ago. She doesn't want him to become president. So she is, in her anger, clearing the way for Donald Trump who is a proven molester of many women, imprisoner of innocent children, and many other crimes, to gain office again.  So in short, she is either a revengeful, bitter, punishing,wrathful, splenetic grudge holder or an incredibly loyal lying fan of Donald Trump  Why, one wonders, didn't she come forward when Biden was chosen for Vice President. She could have made her accusation during the Anita Hill hearings 29 years ago. She could have caused a scandal the day after he received his Presidential Medal of Freedom. She had 27 years to get revenge for this brief non-violent incident if it happened.  But only now does she come forward and shout "J'accuse". Why?