This type of incident is usual in the workplace. It comes under sexual harassment. It’s better that you try to resolve this by talking to your boss. You need to voice up for yourself. You can write a letter or an email to your boss stating that you are uncomfortable with her behavior. Or you can directly confront her.
Usually, they target those who are vulnerable and don’t know what to do in this situation. If you let her know that you aren’t weak and can fight against her. You can warn her that if she doesn’t stop then you will go to the higher authorities. This might scare her and she might stop seducing you.
If she still continues to harass you, then you can file F.I.R at your nearest Police station. And can proceed according to the law.