Mother's Kiss is an unlockable trinket in The Binding of Isaac, added in the Repentance DLC.

+1 Heart Container (will be filled the first time the trinket is picked up).

The trinket will be destroyed if the heart container given by it is the last one, and it is traded/consumed.

Isaac will instantly die if he drops the trinket when the only heart container he has is the one given by it.

The extra container can exceed the maximum coin heart limit of Keeper and Tainted Keeper.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this trinket for the previous Repentance version, check this page instead.

Defeat Mother as Tainted Magdalene.

The following special synergies and interactions for Mother's Kiss have been documented.

* Note that not all possible synergies and interactions are listed here.

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Mother's Kiss

• Grants Isaac 1 heart container while held
• Golden Trinket (without Mom's Box): Grants Isaac 2 heart containers while held
• Mom's Box: Grants Isaac 2 heart containers while held
• Mom's Box + Golden Trinket: Grants Isaac 3 heart containers while held

• Check out the trinket description on the external Isaac Wiki.