Is it normal to have sexual relationship with an elderly stranger?

It happened again, is it normal?

For those who haven't read my previous post you might be a little confused, but it doesn't take much to understand what happened. I suggest you read my previous one so you won't be confused.But it happened again. It was another day, garbage day to be exact and there digging in my recycling bin was an elder Asian woman. She was probably in her late 70's. I had a bag of bottles and cans ready for her and as I was going out to give it to her, she looked at me and smiled. It was the same lady from last time. She was happy to see me as if I did her a favor last time. She said hello to me and as she was bending over to get the bags, she laughed and looked at my crotch. She looked up and said "it's good". I don't know if she was refereeing from last time or if she was asking if I was good but next thing I knew she placed her hand on it. She started to rub me and squeeze it. I didn't know if I should've stopped her or what but she obviously knew what she was doing. She proceeded to pull my shorts down until they were off and she started stroking my hardness. I thought I do something new to her and not the same like last time, so I took it out her hand and pushed it against her lips. She looked a little confused but I guess she realized and she was like "ohhh you want that". So she slightly opened her mouth and I slid it in. I kept sliding it in and out until I came, which was all over her mouth and lips. She looked up and said "you do good, see you next time"..... Is it normal if I continue to have sexual contact with her?