Continue the following story:
NAME_1 has been working as a cashier for months now, knowing most frequent clients by name. She gets quite bored at work, and as a way to entertain herself she tries to analyze what people are buying. Usually, close to the weekends, there are couples buying wine, food, condoms and everything needed for a romantic gathering.  These are quite standard, and NAME_1 sometimes knows people are couples just by looking at what they are buying. Today, however, a weird thing happened. The clients she knew were mother and son were buying one very specific kind of couples groceries, complete with wine and lubricant.
The woman seemed joyful, was probably in her forties, but looked younger. She was a bit drunk and was touchy with her the man who was with her, but in a affecionate way. The guy was probably nineteen and looked a bit shy about the situation, not looking NAME_1 in the eyes.