Proving Adultery

Please advice if one single incident is sufficient to prove Adultery if taken as a ground in divorce case or more than one incident is required & always living in adultery is to be proved. Incident is such that she was caught with paramour at a Outstation Hotel, where they stayed 3 nights posing as husband & wife on Honeymoon. Proofs like hotel bill, flight tickets, honeymoon decoration voucher of room & manager statement are already on record.