We already watch such a sexual show off performed by one of the women attending our sauna. Husband was a little bit afraid, even if he moreover used his nine-o'-tails-cat as usual on the poor working boobs of his wife. Quite often he did not hesitate to put plenty of water in the two bottles to maximize weight.
Of course the tits of this superb endurant well trained lady are very nice and streatched out after such a nice session where she obliges her boobs to support large weights, depending the important liquid she put inside the two bottles!