People who think the baby is <PERSON>: <PERSON>, <PERSON>, <PERSON>
Jamie S7 E5 CERSEI lifts her hands from the chair and places them both on her stomach indicating she's pregnant. <PERSON> looks shocked.
<PERSON>: Who will you say is the father?
CERSEI: You.
Tyrion S7 E7 CERSEI cradles her belly and TYRION notices. She takes a deep breath.
<PERSON>: That thing you dragged here, I know what it is, I know what it means. And when it came at me, I didn't think about the world. Not at all. As soon as it opened its mouth, the world disappeared for me, right down its black throat. All I could think about was keeping those gnashing teeth away from the ones who matter most, away from my family. Maybe <PERSON> had the right idea. Get on a boat, take those who matter.
TYRION: You're pregnant.
People who think the baby is <PERSON>: <PERSON>, <PERSON>, <PERSON>
SO when <PERSON> talks about the baby in S8E4, he means <PERSON>'s and <PERSON> baby. 757
He does not know about the <PERSON> <PERSON> "baby". He has no idea about the <PERSON> baby as <PERSON>, <PERSON> and <PERSON> discuss it just moments after <PERSON>' boats are ambushed by Eurons fleet. And there is no way this information would have reached <PERSON> and <PERSON> so quickly. Also if he knew the baby's was <PERSON>, we can safely assume he wouldn't care that much as opposed to the baby <PERSON> <PERSON> and <PERSON>.
ALSO,
When <PERSON> goes up to <PERSON> to tell her to consider things with her baby in her mind, hes doing one of the two things:
1. Genuinely thinking for the good of <PERSON> and <PERSON> baby and advising her to think of the baby.
2. Knows how <PERSON> keeps her men bound to her by lying and manipulation. Cleverly throwing in a baby shade aiming at <PERSON>, to get into his head and if possible turn him against <PERSON> by talking about about <PERSON> and <PERSON>'s baby. So that if <PERSON> knows about a baby, he may back off support to <PERSON>. <PERSON> knows his sister and probably knows <PERSON> is in the <PERSON> basket for the sleazyness of it.
ALSO,
People who actually know if the baby is real or a thrones move: <PERSON> and <PERSON> 757