I recall my Mother making sounds like that years after my dad was lost in battle (ww2)I would get up to see if she was ok? She would say get in bed with me, it flees good to have someone in bed me, then she would start playing with my wanger till it was hard,then she would rub it on her butt till i came. then i would go to sleep! She would later suck on it and make me cum again in my sleep.