Guys be detective here?

my man took a 2 month break from me but came back missing me. i took him back, but he is buying new underwear and going to the bathroom with his cellphone alot.he is a wya now on a business trip, and at midnight night before he left a male colleague text him, 'tell aisling i won't be in 2morrow' surlely my man wasn't in work next day to tell her,so why did this guy text??