Before going to Egypt, Avraham speaks to his wife, who is referred to by name
Genesis 12:13 וַיְהִ֕י כַּאֲשֶׁ֥ר הִקְרִ֖יב לָב֣וֹא מִצְרָ֑יְמָה וַיֹּ֙אמֶר֙ אֶל־שָׂרַ֣י אִשְׁתּ֔וֹ הִנֵּה־נָ֣א יָדַ֔עְתִּי כִּ֛י אִשָּׁ֥ה יְפַת־מַרְאֶ֖ה אָֽתְּ׃
As he was about to enter Egypt, he said to his wife Sarai, “I know what a beautiful woman you are.
Verse 14 then refers to her as "the woman"
וַיְהִ֕י כְּב֥וֹא אַבְרָ֖ם מִצְרָ֑יְמָה וַיִּרְא֤וּ הַמִּצְרִים֙ אֶת־הָ֣אִשָּׁ֔ה כִּֽי־יָפָ֥ה הִ֖וא מְאֹֽד׃
When Abram entered Egypt, the Egyptians saw how very beautiful the woman was.
Again in verse 15
וַיִּרְא֤וּ אֹתָהּ֙ שָׂרֵ֣י פַרְעֹ֔ה וַיְהַֽלְל֥וּ אֹתָ֖הּ אֶל־פַּרְעֹ֑ה וַתֻּקַּ֥ח הָאִשָּׁ֖ה בֵּ֥ית פַּרְעֹֽה׃
Pharaoh’s courtiers saw her and praised her to Pharaoh, and the woman was taken into Pharaoh’s palace.
Then in verse 17 she is referred to by name again
וַיְנַגַּ֨ע יְהוָ֧ה ׀ אֶת־פַּרְעֹ֛ה נְגָעִ֥ים גְּדֹלִ֖ים וְאֶת־בֵּית֑וֹ עַל־דְּבַ֥ר שָׂרַ֖י אֵ֥שֶׁת אַבְרָֽם
But the LORD afflicted Pharaoh and his household with mighty plagues on account of Sarai, the wife of Abram.
Why the sudden switch to a vague reference and back to normal? I'm wondering if maybe האשה means married woman in this context, so we don't forget she's married and what the Egyptians are doing is wrong? But that's not a satisfying explanation.