1)
Is increasing Zenus connected to remembering the days of her youth?
1.
Rashi: The desire for Bnei Mitzrayim crossed her heart. Tzidkiyah sent to them - "va'Yimrad Bo Lishlo'ach Mal'achav Mitzrayim 1 " (17:15).
2.
Radak: She was Mezanah so much that Hashem remembered for her the evils that she did in her youth in Egypt.
3.
Malbim: After increasing Zenus, she began to request help from Egypt in the days of Tzidkiyah, and to do like Egypt's deeds.
1
This was increasing Zenus! (PF)