Possible Clues:

• Burst into individual finding reading and writing put astray
• It conceals expression of satisfaction arising from break in
• Burst into the sound of a cat sent back into it
• Burst in suddenly
• Break in - I sound pleased about that originally
• Break, rush, in
• Burst in and sound pleased getting back into it
• Sound happy about it outside - break in
• Break in transmission — initially sound content one's put up
• Get in suddenly with first person to find rest and recuperation put straight