Foreign Minister Margus Tsahkna is spending his second summer in a row in Käsmu.
He rents a house there, whose owners are Heiti Hääl's spouse and his mother.
Tsahkna said he sees no problem in renting a house from Heiti Hääl's family members.
The house belongs to the company Sorru Kinnistu, which was founded by MTÜ Käsmu Sadam.
Heiti Hääl and Tiit Pruuli are members of the MTÜ's board.
Tsahkna pays 10,000 euros in rent for the season.
He said he knows the house is old and uses it only in the summer.
Sorru Kinnistu has three owners: Malle Välkmann, Vee-Randa OÜ, and OÜ Mummi Maja.
Mummi Maja belongs to Reet Hääl and her mother.
Heiti Hääl owns many companies that have connections with state regulations.
Tsahkna said he buys gasoline from Alexela, but Alexela does not belong to Heiti Hääl.
Reet Hääl said her property is not connected to Heiti Hääl.
She said the house belonged to her great-grandmother and Sorru belongs to three relatives.
Reet Hääl accused journalists of harassment and said Heiti Hääl has no connection to Käsmu.
She said she has other rental properties in Käsmu that are not connected to Heiti Hääl.
Reet Hääl deals more with Tsahkna's spouse, who has helped organize a children's camp.
Heiti Hääl's concert turnover last year was over 594 million euros.
The media has previously covered politicians' rental relationships.