So I wanna give a background of how I know this man. I remember like being 8-9 years old and always seeing this man and that’s when my aunt and him were dating and ass I got older they had a daughter and I didn’t really have feeling in a way I have today but I always thought he was a good looking guy. They recently had triplets that are so cute and we talk to each other cause he has no one else to talk to all he does it go to work and come home and go to work and come home each day his wife -my aunt don’t want him around females I’m not really sure why but he don’t really have a life and it’s hard to see him he’s always sad and he looked depressed so I went to the store with him yesterday with out my aunt knowing and we’re talking and then we start talking about sex and how I feel about him and he said that I flashed him a few times before and that was a surprise to me cause I never did it was just me coming down stairs at night and he said he was going in the kitchen when he saw me in my towel and the towel was short so when I bent down to look in the cabinet I flashed him I was embarrassed and he said he liked it and I don’t know why but I was sexually attest to him since I was 16 and it’s just grew and grew one day we’re we’re at the beach and his swim shorts showed his print and i was looking at it then we mad eye contact and I was embarrassed so in the car back to the house he said stuff about his past before he got married and how he used to be with a different girl each day until he met my aunt and and we kissed in the car I was talking about how his kids are cute and they are getting older and he just kissed me I didn’t pull always instead I kissed him back and the we started to text each other in the heat of the moment and now I am about to have sex with my ants husband and I know this is so wrong I never did any of this and he said I’m 18 now and I can make my own choices and I ..I don’t know what to do I’m not good at telling people no and ...please help me any one and I mean I have 2 days to say no so.

Any advice or tell me how much of a bad person I am or whatever I just need help