Ablution not necessary after kissing
Sayyidina Urwah reported from Sayyidah Aisha (RA) that she said that Prophet (SAW)
kissed one of his wives and without making (fresh) ablution stood up for Salah. Urwah
said that he remarked, "Who could that be but you." She laughed.
[Ahmed25824, Abu Dawud , 179, Nisai 170, Ibn e Majah 502]