Daughter-in-law relationships tend to fall into 2 categories. One is the tense type that makes for nice gossip and jokes. The other is the blissful sort where the daughter-in-law practically becomes a daughter. Whatever type of relationship you’ve with your sweetest daughter-in-law, it is important to wish her a birthday when the day comes around. Wish her day with this sweet cake and a beautiful note to make her feel special.