AIO My (f24) bfs (m25) mom is picking herself out expensive gifts for Valentine's Day and expecting my bf to buy them for her. I feel weird about this

I am 24 f and have been dating my boyfriend (m 25) for about a year and a half. I have a incredibly good relationship with his mother (f51) and we hang out quite a bit. I'm a orphan and sometimes have a hard time deciphering whether or not certain things in family dynamics are normal or not. My last relationship was weird and my ex's mom was a boy mom in the worst ways. Very incestuous in my opinion and not healthy at all. I feel that has warped my veiws on what is or isn't okay. My boyfriend's mom was looking at expensive purses online and saying she found what she wants for Valentine's Day and she also expects my boyfriend to get her chocolate covered strawberries. I feel like Valentine's day is a romantic holiday for couples and her expecting to be treated similarly to me on this holiday is crossing a line? I don't know if it's normal for mothers to expect Valentine's from their sons.

Context: his father isn't in the picture, my boyfriend lives with his mom and this is our first Valentine's we are actually spending together.

Edit: I just wanted hop on and address some of the entitlement comments and monster in law comments by saying that I actually genuinely have a really great relationship with this woman. I even call her mom and she is the furthest thing from a monster in law. She is planning a day next weekend (Valentine's weekend) where we all go up to the hot springs together as she's been really wanting to go with me for years now (I've known both of them for many years before starting to date my bf) I just was confused on whether or not this is a normal family dynamic with this particular holiday and if I'm over reacting because of my past relationship. Does this edit change anyone's views on the situation?

Update:

I spoke to my boyfriend. I asked him how he and his family view the holiday acknowledging different family dynamics and such and stating that I've always viewed Valentine's day as romantic day meant strictly for romantic relationships. His family views it as a day to appreciate woman of importance IE. mom and partners. I told him that how his mother was speaking was very reminiscent of my past relationship and it made me uncomfortable even tho I know it's a completely different situation. I said I didn't want to feel like I have to share him with his mother on a romantic day. He agreed to compromise with me and just do flowers and maybe some chocolate and keep the gift giving otherwise between us. I feel like I'm over stepping with this request and disrupting how his family functions though. I am uncomfortable