If Rubio is going then Lavrov will go. This is not a difficult equation. Russia quotes this morning says the subject of Lavrov’s presentation will be conditions on the ground — which would seem to be the obvious starting point.
When foreign ministers travel to a home country, then that country’s head of state will meet with them. Putin spent hours with Witkof in St Petersburg. I can’t recall instances when a head of state travelled elsewhere to meet with a foreign minister, so Putin going there to see Rubio seems unlikely.
Meanwhile
Ukraine defense lines collapsing
This video describes the military situation in Ukraine on the 14th of May 2025
https://rumble.com/v6td1o9-mykhailivka-has-fallen-zelensky-doesnt-know-what-to-do-military-summary-and.html?e9s=src_v1_ucp