Kia Orana KimJessieO, welcome to the forum.
I can well understand the sentiment for wishing to return to the Cook Islands, given that you will have many fond memories of your wedding and honeymoon here. The captive magic of this destination and its culture is what draws people back time and again. No wonder our people write and sing so many love songs!
Depending on when your family decides to return, one property on Aitutaki to consider (with a toddler in mind) is Are Tai Villas on the western side of the island. Roomy 2 br stand alone villas, with the 3rd one being positioned a little further back from the beachfront. Next door is Puffy's casual dining, with the shops being not too far from the villas - aretaibeachvillas.com/aretai-villas/welcome_…
For Rarotonga, Vaikoi in the Aroa area, is lovely. Spacious family unit, with affordable rates, and its a step away from a lovely beach near the Rarotongan Resort and Kaena restaurant - http://www.vaikoi.com/pages/rates/.
All the best - kia manuia.