Who Stole Mother's Cosmetic?

Not for a long time my mother had a birthday. And I scratched my head over what to present her. As usual modern woman my mother has a passion. She modern woman and take care herself very thoroughly. And she has a lot of different masks and creams, especially for the face. Once upon a time her favorite cosmetic's line produced new deep cleaning cream and it would be a good present for my mother I thought. So, I bought and presented it to my mother. She was very glad, because she just thought to purchase it. She liked this cream very much, but she didn't use it everyday. Once upon a time she mentioned that the cream on the jar was less than yesterday. But she didn't take it into consideration. Day by day cream disappeared very rapidly. It was like a mystery. It meant only one - someone took mother cream for the face secretly without her allowance. She wanted to find out who it was. But it wasn't so easy, because we have a big family. My father, me and our grandmother she didn't take into account. So, it may be only two my elder sisters Christine and Samantha, my aunt Clair, mother's sister or mother's best friend Stefani she visited us very often. And she pursued some investigation. She turned on her computer and directed it to her console-mirror where her cream was and switched on web-camera and push the button rec. In the evening when she came after her job first thing she went to check web-camera. And when she saw the track she couldn't believe to her eyes. It was not Christine and not even Samantha, it was our old grandmother. She was very surprised. She had mixed feelings. It was very ridiculous. She decided not to announce this event; she just presented to our granny the same cleaning cream. And she wished her to remain young as possible.