They were definitely not relatives. I don't know from what countries you are, but Im from Lithuania myself, here we have thousands of Ukraine refugees coming every day and a lot of people are offering their homes to them for free. One of them are Ievas parents. Anyway, later Ieva updated in her stories, that woman with 6 kids are moving to other place and they will have new family coming soon to live with them.
Speaking about Leka, her last post in instagram was like half an year ago, dont looks like she is very active there, so I dont see nothing strange she is not posting anything now. Also she is not from real Russia, she is from Kaliningrad, it is quite big difference.