So he “needed a life” and that was ok, but now your child needs some reassurance and that isn’t! Let me guess, he has a girlfriend and wants to demonstrate how he’s such a great dad.
Can you suggest that he does bedtime routine at yours a few times – bath, story etc – and he might try asking his child to chose bedroom stuff for his house – Dinosaur duvet, night light, pjs etc.
Or you could just tell him NO (tempting) but that might not be responsible in the long run 🤔