A coworker and I carpool to work. She texted me a half hour before we normally leave saying that she'll be a little late. It takes half an hour to get to work and we leave an hour before we start. So I waited until 20 min before work and texted her asking when she would be here. She said in about 10 min. It's now been 40 min since then. We are 30 min late already plus travel time. I know I should've asked her for a specific time in the first place so that I could find another ride if necessary. But to me a little late is leaving no more than 15-30 min after we usually do. I'm also curious to find out why she's this late. She's always on time.