What would it be like if you actually got to see your older stepsis naked? Would it be an accident, like when she's getting out of the shower? Or would she get curious about you and get a little carried away? Maybe she catches you watching her with her tits out and her hand down her pants, then tells you to stay. Would she stroke your cock between those giant boobs for a bit and THEN take her shirt off and milk you cum all over her jiggling, oiled up tits? I can't say for sure, but I think it might be all of those things <3