How would you deal with this?

[Barmaid]

I recently met my SiL for the first time and we got on really well. She started telling me about a relationship she has online with a "gentleman". Initially the details rang alarm bells with me. Last night we had a phone call from my BiL who gave a few more details. I am now absolutely convinced I am right and that her "love", is in fact a scam artist from Nigeria (I have some considerable experience of these people in the past, so I know exactly the type I am dealing with). I am concerned because it is her birthday at the weekend and she will get a lump sum as part of her pension. He has said he is going to set up a jewellery business in the Uk (yeah right). She is a lovely lady, but lonely and quite naive.

My problem is this. My other SiL has tried to talk to her and persuade her that this chap is no good. She will not listen. They actually fell out for a while over it. So do I

a) chat to her and explain why I have these concerns
b) obtain his details (I can do this surreptitiously if I use her PC at the weekend) and then compile evidence against him
(either of the above are likely to shatter her world, but I would rather shatter it now than later when her life savings are gone)
c) leave well alone - she is an adult and entitled to make her own mistakes.

[Bbbananas]

She'll thank you for it one day Barmaid. Hopefully. x

[society]

Option B, and while this is in motion, what Dot suggested is not a bad idea.

When she realises what a con-artist she felled for, all the hurt will diminish, and hopefully she will thank you and not be upset with you.

[saxy_jag]

Do b) and then email him and do a bit of baiting - you should be able to get some tips here: http://www.419eater.com/index.php . If he really is what you think, he'll disappear faster than a rat up a drainpipe.