low-quality moans and mumbles make sense to me. text (subtitles) could fill in the rest. but I don't think you need long conversations or "ooh ooh yeah like that". Just text where it adds context to show emotions (like reluctance or pity or enthusiasm or humiliation). Ex. ("I really need this, honey..."; "I'm not sure about this..."; "I shouldn't be doing this."; "That's so cute little bro" etc.)