Spoil (someone) rotten

Translation of "spoil (someone) rotten" into Russian

избаловать (кого-то) до безобразия

Grandparents often spoil their grandchildren rotten.

Бабушки и дедушки часто балуют своих внуков до безобразия.

To treat someone with excessive kindness or generosity, often to the point where they become overly indulged or pampered.