Whether you should actually do anything for your boyfriend’s mom depends a whole lot on the relationship you share with her and her son. If you and your boyfriend just started dating, then you don’t need to do anything for his mother. If you and your boyfriend have been together for a year or less, then you are unquestionably in the clear. If you and your boyfriend have been together for about a year, then you can do something for his mom for Mother’s Day if you want to, but you’re under no obligation to do anything. If you and your boyfriend have been together for two or more years, then you should do something for his mom this Sunday. These timelines are conditional on what sort of relationship you have with his mom. If you and your boyfriend have only been together a relatively short period of time, but you’ve grown close to his mother during that time, then you are welcome to do something nice for her this Sunday. However, if you and your boyfriend have been together for years, and you’ve never even met his mom, then Mother’s Day might not offer the best opportunity to reach out to her.