AIO that my stepdad doesn't make an effort after the newborn phase?

Okay sorry but this is a bit of a long one so TLDR is at the bottom!

I’m due any day now with my second baby, and something has been bothering me more and more lately and I genuinely can’t tell if I’m overreacting.

When I had my son in November 2024, both sides of the family were super excited. My stepdad especially was over constantly during the newborn phase — probably 2–3 times a week for the first couple months. He seemed obsessed with the baby and really involved.

Then we moved into our new house in April 2025, and he was incredibly helpful during the move and with renovations/projects around the house. We appreciated it a lot and helped him whenever we could too. But over the last about 6-8 months, he’s basically stopped seeing my son altogether.

For context, he and my mom live less than 5 minutes away both from our old place and current. My mom still comes over multiple times a week to see him. My stepdad works from home full-time and gets off at 5pm, and my son goes to bed around 7/7:30pm. I asked my mom why he never comes by anymore, and apparently his response was basically “I get out of work at 5 and he goes to bed at 7.”

That excuse just feels… odd to me? Especially because he used to make so much effort before. He hasn’t really seen my son since before his first birthday. Apart from the few times my mom has maybe brought my son to hers when watching him, I can probably count on one hand the times he's come over to see him since Christmas.

Now I’m about to have another baby, and suddenly he’s been texting more asking about the new baby specifically. And honestly? It’s making me anxious that the same cycle is going to happen again — tons of excitement while the baby is tiny, then disappearing once they’re not a newborn anymore.

What hurts most is that he still hasn’t really made an effort to see my son now. He’s not a baby anymore, but he’s still his grandson.

I don’t know whether to bring it up directly and ask why he stopped coming around, or if I’m taking this way too personally and expecting too much from a grandparent/step-grandparent relationship.

TLDR- My stepdad used to come see my son 2–3 times a week when he was a newborn, helped a ton when we moved, and seemed super involved. But for the past 6-8 months he’s basically stopped seeing him entirely despite living less than 5 minutes away. Now I’m due any day with baby #2 and suddenly he’s messaging more about the new baby specifically, which is making me worry he only likes the “newborn phase” and will disappear again once she’s older too. Am I overreacting for being hurt by this?