I did some looking into it and reworked the last sentence, but I'm no expert, so feel free to tinker.
It's not totally clear to me either, but my thought based on the scene, and Haruhi's personality, was that she was telling Kyon he should be grateful for what she does, and not the other way around.
She means Kyon should be grateful for all those effort (dishwashing) he does every day. Else, she wouldn't do it and her hand wont be so silky
pssssh...to touch my dick.Sure!If your hands became rough because of the detergent, Haruhi...You do the cooking every day, after all!...I'd hate that.Because I want you using your silky, smooth hands...Ohhh... your hands feel good... ♥Besides...Thanks for always doing the dishes! ♥Shrewd Planningscrub scrubHuh...?...Be grateful that I choose to put my effort into this day after day, okay!