Christmas gift for SO's parents?

We haven't been dating THAT long, so I don't feel obligated to get them something, nor do I know them well enough to get them gifts

I of course got my boyfriend something and his little sister but I just realized Christmas is 8 days away and never got his parents anything. I'm a naturally caring person by heart and never want to hurt someone's feelings, besides they said of all my boyfriend's girlfriends over the years I'm their favorite, even his dad likes me and talks to me which is saying a lot apparently. I have a pretty good relationship with his mom and she's a pretty giving person not to mention I heard him and her whispering about me about Christmas so I feel like she got me something or she is

I asked my boyfriend what I should do, or their interests and he said I don't need to get them anything it's completely fine but I feel like I need to get at least something

Should I just get them a Visa gift card or something along those lines? Or would it be OK with me not getting them anything?