Kelly will offer to feed your fish when you get some fish, no flirting required.
Import the .7z file into ME3Tweaks Mod Manager. Apply the mod to the game. Play the game.
Manual installation is not possible, this mod relies on features provided by the mod manager.
This mod is fully functional with English audio and any subtitles. If you play in a language other than English then, as above, the core function should work, but you will not get the new neutral response option. (Please note this is untested).