Did I over react?

My husband goes to work a hour away everyday, he works night shift and gets off in the morning. He text me and told me he was going to sleep at his mom house since his mom stays 20 minutes away and he was so "tired" and didn't want to drive home sleepy. He has been at her house from 7 am since he got off til 5 in the afternoon. I told him he has to get his stuff and get out and I want a divorce. Sounds like he was cheating to me, he could have took a quick nap and got on the road. Anyone else been through this and found out they were cheating ?

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