So I've asked a question similar to this one (it's on the second page of this board).
If your LO1 weaned completely before you had your LO2, did LO1 want to start nursing again after LO2 was born and was nursing? Did LO1 have to relearn how to nurse?
Re: Tandem nursing question
I can't answer from experience since DD1 didn't wean prior to DD2's arrival. But if LO1 was weaned and wanted to start BFing again you would have to retrain how to suck properly. But I suppose that all depends on how long they went without