Too often seeing parents?

My boyfriend & I just got into a huge fight because I told him I was going to my moms after dinner tonight to help her with something she had asked me about. She lives 15 minutes from us. My boyfriend & I have two small kids (both under 3). My mom ADORES them, and they love her. They get so excited when we go see her.

Usually my mom invites us over once or twice a week, sometimes for dinner, or sometimes we just meet at the park so the kids can play. Anyway- my boyfriend NEVER goes. I can count on one hand how many times he’s been there in the last year. He won’t give me a reason, other than “I don’t want to go”.

Today, we got into a fight because he said “it’s not normal for a 23 year old to see their mom that often..not normal at all.”

So do you think it’s too often? I love the relationship my mom & I have, and now the one she has with my kids. I want them to be close to her, like I am to my grandmother.

Sorry for the rant.. I’m just looking for opinions.