So DD1 (6) came home last week saying I know how to spell sex and proceeded to spell it out and got all giggly & shy when I asked her how she knew that word and if she knew what it meant.

I played it down and just said it's an adult word and she told me an older girl had told her it meant when mums & dads got married.

This morning she got all funny again when she said she had written sex in invisible ink then started crying and saying "I need to tell you something".

I asked DD2 to leave and she said that her friend at school said that mums & dads got married, did sex then get a baby then they get married over and over again to have babies.

She seems quite scared to talk to me about it thinking she's getting in trouble because I said it's an adult word, where do I go from here.
I don't want her to worry about talking to me about these things and at the same time I don't want to make a huge deal out of it.

I don't want the other little girl to get in trouble and I'm not really sure to what extent she knows any more than marriage, sex, baby.

I thought this conversation would be well & truly years away.... HELP!!!!