Is it normal that my boyfriend is saving up to buy a house for his mom, and not us?

We talk about marriage and and getting a house together one day.

I’ve been saving up and investing to have money for a house one day. Whenever I tell him this, I kinda expect him to be like “me too,” but instead he says “that’s good. You can buy us a house and I can buy a house for my mom and charge her rent.”

It baffles and annoyed me that the first thing he thinks of is supporting his mom, not me. I don’t get why he would want to help me buy us a house. What is the point of even getting married if he doesn’t want to contribute to a house? Is this normal? I’m confused.

His mom is super young and works and has a husband. They used to be homeless when my boyfriend was a kid, but she’s successful now and has money.
Is it normal that my boyfriend is saving up to buy a house for his mom, and not us?
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