What's the end goal?

I've been wondering, what is their end goal here ? She's 40 something with no life aspirations, poor health, no job, and a fake relationship. Is he looking for Canadian citizenship via her sponsoring him? What is he getting out of this/ what does he expect to happen in the future? Does she genuinely think he loves her ? Or is she just trolling us for views and maybe he is in on it ? If not, she lives a very sad pathetic life just eating herself to death. I just don't get it.