How did you catch your ex or husband cheating? May mag signs ba kayo na napansin?

Before the week I found out he was cheating, late sya nakakauwi at wala ng time samin ng anak nya. Im so f up kasi hindi ko man lang napansin. Sinabi lang saken ng mga kaofficemate nya na parang may something sila nung babae which is kaofficemate din nila na bago. Dati kasi kaming magkaofficemate ng asawa ko kaya madami akong mata sa office.