My sis ....often time this occurs after child birth due to several reasons ....but basically psychological effects , the mind now has a new focus ( the new baby) to care for,pamper and watch over ......it takes a conscious and deliberate effort to make your love life active ..as it is very important in your marriage ..note that your husband is your for first baby so he needs your utmost attention (na God I take beg you oooo). Make out time together and bring back the old days sis ! God bless u