此句应该改成Just living with my family and enjoying the happiness of domestic affection with slights are enough. 这个句子的主语是并列动词短语living with my family 和 enjoying the happiness of domestic affection with slights ,当动词(短语)在句中作主语时,要用其不定式或动名词形式;而因为是两个动作作并列主语,即,主语是复数,所以谓语动词be则应用其复数形式are.