Icardi secured a season-long switch to PSG from Inter on deadline day following much speculation over his future since he had been stripped of the captaincy at San Siro in January and then excluded from training with the rest of the squad this season.
The striker had been linked with Juventus, Napoli, Monaco and Atletico Madrid but agreed a one-year contract extension that keeps him tied to Inter until 2022, though the club have given PSG a reported €70 million option to buy Icardi at the end of the campaign.
Nara says she always had the switch to Paris lined up even though it is not the ideal scenario for her.
"If I waited until the last moment, it's because I had an ace up my sleeve," Nara told Argentine show Morfi Telefe. "Nobody knew, not even the kids. Mauro packed a small suitcase and left the rest to me.
"The kids go to school in Italy, so we'll live between Milan and Paris. Of the three options we had, PSG was the worst for me, because I have to go back to live in Milan with the kids.
"But I thought of what was best for him. There were many important Italian clubs who wanted him and it would've been easier."
The 26-year-old, who has scored 124 goals in 219 appearances for the Nerazzurri, did not feature for Antonio Conte's side during pre-season or the opening two games of Inter's Serie A campaign after being told he could leave.