abs anthro back_muscles black_nipples breasts casual_exposure casual_nudity chest_tuft female furniture genitals group inside looking_at_viewer muscular muscular_female neck_tuft nipples nude_female on_sofa presenting presenting_breasts presenting_pussy pubes pubic_fuzz pussy rear_view sitting sitting_on_sofa smile sofa spread_legs spreading suggestive trio tuft anonymous_director hyaenid mammal hi_res
Rather quickly the discusion skewed into lewd territory. The sisters started inquiring "So, how often do you two fuck?" or "How many rounds can you go before you're tired?" as if it was a 
normal thing to ask someone you met a few hours ago.