First time with older lady.

When I was about 15yo. I used to go and do errands for the local people were i lived. Shopping. Gardens. Anything really. Mostly for older people. Well one day I knocked on the door of one of the regular people. A lady. A very mature lady. She opend the door in her house gown.Thats what she called it.and apologised. I said not to worry about it. As i have a mother and sister. Anyway I went to the shopping. I didn't think anything about it. When I got back back. I was invited in like every other week. But things were different. I could tell things were different. Id had girlfriends.but Christine was..?j.