I am the father of a twelve-year-old girl, Alice. We live in the United States. My daughter has fallen in love with her peer Amelia. I and her mother are not against our Alice loving Amelia. We believe that our daughter is entitled to that relationship. But the thing is, yesterday my daughter brought Amelia to our house and asked my permission for her to stay with us overnight. I gave her permission. Amelia slept in my daughter's room at night. But as everyone in the house fell asleep, I heard soft moans coming from the girls' room. I decided to see what was wrong. When I opened the door to the room a little I noticed that the girls were lying on the bed completely naked and studying each other's bodies. I did not interfere so as not to frighten the girls or harm their psyche. This morning when the girls woke up and started breakfast, I asked them what they had done tonight. They were very embarrassed. So as not to embarrass the girls, I simply told them that what they were doing was perfectly normal. The girls, seeing my support and understanding, decided to tell me what they were doing. They said they had been exploring each other's bodies that night, caressing each other's bodies. My daughter even told me that they had experienced some strange but pleasant feeling (most likely the girls had experienced an orgasm). I was shocked, but I didn't scold the girls. Instead I started explaining to them that what they were doing had to be kept secret from everyone, that it had to be consensual, and that it had to be hygienic and respectful of each other's intimate health. I did not forbid them, but told them about the rules during such games at their age. The girls listened to me carefully and agreed with everything. They also said they remembered everything they were taught at school in sex education classes and followed this knowledge. After my talk with them, the girls became cheerful and even hugged me in gratitude for my kindness and understanding. It felt so good.

I have a few questions for you about this:

1. Is it normal for girls their age to do these things?
2. Is my action in this situation correct?
3. Assess the girls' reactions.
4. Should I forbid my daughter to engage in such intimate games with another girl, considering that I personally and her mother are not against such games, and the girls follow everything they were taught at school in sex education classes?