she said that it doesnt say that you cant walk around in front of your father with ervah showing, rather he cant make a bracha or say krias shema in front of you if ervah is showing so therfore some poskim hold that he cant see you in pajamas at all.
The “Therefore” is extremely weak, and contradictory to the Mishna Berurah that she quoted. Perhaps you should ask her for the “Posek” who holds it is assur? I believe if you challenge her, she will once again retract and say that some poskim “recommend” to always be fully covered, but no Issur exists (Perhaps something like Gur may say Assur, but that is their own quirk). Furthermore, we don’t pasken like these Poskim.
Good for you that you that you asked. I’m impressed.