Marcus was caught between either a groan or a laugh at this, instead just finding amusment in the bulging eyes of his father and the red hue that was slowly creeping across his face.  
"How dare you speak to us like that". Hissed Martha, voice thick with disbelief at Rin's rudeness as she cluthched at Lucas's arm.  
" oh please, its not like you haven't heard worse." Marcus snorted, picking up his drink again before turning away from his parents and grinning at Rin above the rim of the glass.