It's really hard to believe she's dumb enough to 1. entertain the ambivalence she got from David Haye in this "situationship" about his relationship with Sian - what self respecting woman would put up with that? and 2. NOT know that it was going to cause a media shitstorm to post pictures of the three of them together, all loved up, using language that infers they are all in a relationship.
Una's been dealing with the press for more than 15 years now, she knew full well what she was doing. I think it's a case of the woman just loving attention, and in her 40s now with a solo career that never took off, bandmates that have been much more successful, a loved up cheating ex and a series of failed relationships - she just wanted to make a few waves. And didn't she do that.
I'd have respected her more if she didn't "speak out" like this and frame herself as a victim, and just said nothing. It speaks for itself really.