Mike gives a playful sort spank on Anna's ass and he grinned while taking seat on pool bench and said; "Why not use reversed cowgirl position, basically you ride my cock while looking on your dad over there." He hoped Matt would get further excited by seeing his daughter's blissful expressions while she would take nice firm meat into her cunt and ride it, see her breasts pounce was a visual bonus. Mike stroked his cock and with hooking his finger gestured Anna come over, he will help and guide her to proper position but also let her move and take comfortable position, as she will be doing the most amount of the movement.