I don't wanna watch my grandpa anymore. Am I bad granddaughter for feeling so sick?

Hello, first off I'll warn that this story is hard for me to share and I may get flagged, and I hope you can give me some advice or the community's insight. But I really need some outside perspective since my family cannot help me or won't help me. Please.

I (29 F) have been unemployed since the start of 2025 and keep on job hunting since that day on, living with my parents until I earn enough money to find a place. Aside from more courses and specialties done (I'm a nurse) my family suggested me a gig: My aunt (76F) and uncle (81M) will pay me to help and watch my grandpa (105 M) who has gone downhill on his health.

For some background, my mom is the youngest of the family and I'm the youngest grandchild, as my dad would constantly be overseas working, my granny and grandpa would aid my mom while raising me. Now, my granny passed away 11 years ago and my grandpa used to live alone, until two years ago. He lost most of his hearing and sight, and cannot walk well making him unable to live by himself. My aunt, the oldest daughter decided to take him in and all was fine at the beginning.

I would come by, spoil him with sweets, wash his face and hair, help him get dressed up, cook for him and even chit chat for hours with him even when he couldn't understand a WORD I was saying due to his deafness. Until his mental health had gone South. Before anyone say something regarding that, I'll say: 1- I'm a nurse, specialist on gerongeriatric care. 2- I'm aware of the changes and conditions my grandpa suffers.

I have seen him acting out. Tantrums, cussing and even not sleep at the night, I'm prepared to face that and so far, it's been months now. But things started to take a strange and uncomfortable turn as his behavior began to be...lewd.

He would suddenly expose himself, say naughty comments regarding myself or body, try to grab me or lure me to get closer to him. At the beginning I try to rationalize those actions (he's experienced sundowning syndrome) and just keep my distance while taking care of him...but I can't help but feel sick everytime I go at my aunt's place And yesterday, he's been really insistent on some lewd proposals towards me. I try to tell him who I AM, that I'm his granddaughter (his lil' dove, as he used to call me) and he seems to understand as he ask how my mom is doing (his youngest daughter) yet continues acting in such depraved behavior that makes me nervous to even get closer to him. Nowadays, he won't get up of bed or do much but I must be around in case he tries to gets up, falls down or throw his urine disposal. And he's trying to use his hands to grab around...so, I'm not comfortable at all.

I don't know what to do. I should be professional and keep my distance, I have always done so well with other patients but here is my grandpa. And seeing him act like that, taints my memories with him. What should I do?