I think the drama happened a bit after they parted ways but not certain.I don't really follow Becky, but have gotten some of her videos on my recommendations on YT, wen she was moving in with her ex, and the when they split (with makes him a ex-ex). The a random video of her moving away.
What kind of drama has she been a part off, if it is really bad it could be a reason why Fleur has distanced herself. Mike is a face of a company, so any drama his wife or her friends are a part of, will affect his and the company's image.
She alluded to her ex leaving her with some life long condition. Always dancing around the issue, it seemed like just mentioning it enough to get views but never actually saying anything of note.
She seems to move all the time and have health issues too. She also seems so skinny now. She seems a bit sad really (and then I find the clickbait 'what's really going on' titles really annoying).