I was just listening to Grimmy's show and they were talking about Cheryl's bump on the cover of the Sun. No mention of Liam. I have no idea if this is relevant in any way, but you are always analysing stuff so I thought maybe this info helps you?
I don’t know what Grimmy knows, but it’s impossible that they don’t see how weird this situation is, so they were probably playing it safe.
This is clearly Cheryl’s game, Liam is just a name for her to use so that during her silence, the questions are not about trying to suss out who the “father” is of the baby she won’t discuss. That would divert attention to the different men in her life.
This way it’s ALL about her.