<human>: So, my girlfriend was in Germany for the week with her dad, and during it, she apparently got sent a message that said, in Finnish: "[Her nickname], you have received a new picture message at: [Link] " This link, for god knows what reason, takes you to Ashley Madison's login page. For those who don't know, Ashley Madison is a website specifically made for people who want to cheat in relationships.

My girlfriend and I have been together for about 10 months now, and so far we're doing the best I've ever done with the girlfriends I had before her. We've had more issues, sure, but we've always communicated clearly about them. This, on the other hand, is an issue that we can't really seem to solve alone, for many reasons. She told me she didn't even know Ashley Madison was a thing. But the message had her nickname, which is only used by two of her closest friends and me, and a nickname that she says is not used *anywhere*.

As an aside, I found the message on accident when trying to turn on her phone's hotspot, looked at her messages because she had an unread one, and saw that weird message.

What is this? Is this some weird guerrilla ad campaign, or is this something malicious from my girlfriend or some rando weirdo? The message came from the phone's built-in system, so it's not a fake-out person trying to pretend being a machine. And it says "picture message", but it has a link to Ashley Madison. This is so odd, on so many levels. Is there anybody here who's actually used Ashley Madison who knows if you can send images to other users through phone numbers?

And please, for the love of every deity, don't go all "she's a whore dump her" in the comments, it's not constructive. Even if she HAS cheated, it's our issue to deal with, and my position to judge or not judge her. I'm just trying to figure out this weird mystery.

Thanks for the comments anyways, and for reading if you got this far!

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Could you distill the essence of the text into 1-3 sentences?
<bot>: Girlfriend in Germany, got weird "picture message" on her phone that links (for me) to Ashley Madison. What is this?