Never giving lift to anyone going forward.

So I live in the suburban area. Home is 5kms from Avadi. The bus service despite being increased hasn't been the best. Whenever I go to Avadi on my bike, if someone wants a lift, I usually give them a lift. Been doing this for a long time. Irrespective of them being a Male or Female. Today noon I was going to Avadi on my Dio and a lady possibly in her mid 40s asked for lift. I don't know her but she started chatting after 2,3 minutes of getting on the bike. Soon she started grabbing my hips and butt for support, I thought it might be accidental so said to her that there is a bar at the back that can be used for support. She took her hands immediately but again after few minutes started to grab my hips. I don't know but it seemed intentional and she kept blabbering about her husband being busy to drop her etc. I was shit scared as it was unwanted advances and felt totally unnecessary from her part. Soon I reached Avadi and asked her to get down, she got down and touches my shoulder and says bye. I double checked and she didn't look like a Trans. But I do feel violated. For context I'm Male in Mid 30.