As the saying goes, a child's birthday is the mother's suffering day, so it is only natural for the mother to receive a gift on the child's birthday. Why not DIY a heart-shaped chocolate? The chocolate can be made into a light pink color if possible, and then engrave some words on it, and finally add a beautiful package. This gift will definitely be very popular with your boyfriend's mother.
If your boyfriend's mother is very fashionable, you can give her a floral dress, a well-fitting suit, or a box of makeup to make her look younger and more fashionable.
You can also give your boyfriend's mother a housekeeping card, so that her boyfriend's mother will have more free time of her own, and can go shopping with friends, play poker, etc.