

I suspect Nicole is a similar sort of operation to Aidana the pretty lady dentist from Kazakhstan, only aimed at people who’d be more sceptical. So instead of stealing images from a fitness influencer, they got some from a more average-looking young woman and made up a story. If it’s like Aidana, there’s a guy somewhere (probably in the hinterland of Russia or elsewhere in the former USSR) whose day job is to string the people who reply along, lead them into believing they have a relationship with this lady, make sure they’re absolutely sure this isn’t a scam, and then pig-butchering them for all they’re worth.
It could be a threat, or it could mean something like “hang in there” or “stay the course” (“dead” as in dead straight, dead reckoning or similar), possibly from some specialised vocabulary. Is there more context?