The fic was on AO3, I believe. Tony and Loki get together. I think Loki was exiled to Midgard and Thor accompanied him. They were staying in the Tower - I think. Tony is fascinated by Loki and his magic. After an awkward and less than easy start Loki agrees to teach Tony about magic. At one point Loki can't sleep and Tony takes him to a local hospital. There he shows Loki the NICU and has him help Tony volunteer work - they spend time holding the fragile babies - especially ones without a family to spend time with them. Over time they both bond with each other and with one orphan infant. They make inquiries about fostering-then-adopting one particular baby boy, unfortunately a couple has already started the process. Tony and Loki are kind of devastated. Meanwhile there is an altercation with young-adult enhanced kids. Tony is in great danger and there is not much Loki can do to help I think. Sound familiar to anyone? Any pointers/help would be greatly appreciated. Thanks in advance.