Can someone be arrested for letting a 23 year old man kiss a 15 year old girl in your home?
Possibly yes is the answer, If this is happening then the law if involved may ask questions about a sexual relationship between the two. The man is much too old to be involved with a young girl and would be seen as a paedophile. If it is your home this is happening in then you will have some answering to do also. Its not easy explaining this away. I should put a stop to it for the sake of the girl.