It is narrated from Sayyidah Maymunah bint Sa'd (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) was asked about a man who kissed his wife while fasting, when both of them were fasting. He (peace and blessings be upon him) said: "Both of their fasts are broken."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21520