I'm not sure I buy the fact that she's done 2 PCRs since New Year
For starters, why has she done 2? If you have symptoms and you have a PCR test that's negative, why would you get another PCR? It's the same episode of symptoms? I could understand if you were poorly, did a test and got better then got sick again, but she's been constantly under the weather since New Year, doesn't make sense to have 2 PCRs to me. Especially if you're doing regular lateral flows.
Also, if you're symptomatic and have a PCR you're meant to isolate until the results come back; not only has she never mentioned having a PCR, she's certainly never mentioned that she's isolating once, let alone twice. And she's been out with friends, been to the dentist, out shopping, getting nails done, birthday drinks, gender reveals etc so all in all, I find it hard to believe.