Tried a quick translation. Not sure what was the best term to use for 'dakkoshite' would be. Also left onee-chan (older sister, big sis honoriffic) untranslated because I'm not sure of the general rule on that. Feel free to change if necessary.
Um...Y...y...you did well...Praise me onee-chan!Nachi onee-chan! Embrace me!Nachi onee-chan!What are you doing? Aren't you a grown man?