I checked the forums, I checked the FAQ, I have looked through the game page MULTIPLE times and cannot find the report button. CTRL+F does not find it either. I checked the page HTML, no button to report in there either. I am on Windows 10, Firefox web browser and logged into itch.io
I would have simply reported it, but since the option is not available, I am going to raise  awareness to the issue. I believe they might be using the blog feature in order to avoid having the report option on their posting.

Do not download or install the game!
Here is the offending game:
https://itch.io/blog/733795/my-shameless-stepmom

This is the profile
https://itch.io/profile/carlson78

You can't find a report button because that is not a game page. If not, a development blog that that person is camouflaging as a game page.

Note that in Itch the game pages have the following format:
<developer_name>itch.io/<game_name>

See also https://itch.io/t/3744851/help-me-get-this-virus-page-removed-from-itchio-blogs#...

There are many such accounts. People here are notoriously lazy to report things. And blog posts do not even have a report button, so even less people will mail a report to support. The interesting part is, how many followers some of those fake accounts have. The other one had over 50. Were all those people not recognising the scam for what it is? I certainly did not, but when I saw those, there were no links on the pages.

They should close this and other exploits the scammers are using. The more popular itch becomes, the more attractive it is for scammers, so attempts will increase. I see too many hacked accounts already.

To report an account or blog post, you can contact support the usual way.