If the friend you send your daughter to is kind, it is a broadening experience for your daughter to experience friendship beyond her own family, but with your approval. As she grows up she will be able to extend friendship to others all the more. She will know that there are safe ways of doing friendship - important in this weird world. And she will be able to cope better on the odd occasion she might see you in a bad state. It's thoughtful of you & your friends to provide that broadening opportunity & relief for her.