What would you do if you were walking in a store with your partner and your ex saw you and said are you coming over tomorrow?

Your ex is your ex baby momma that you have split custody with that asked you to come help fix something in her house , you told her you will fix it because your kid is in that house as well. This happened to a friend of mine and I just want to hear what you would do on that situation lol
What would you do if you were walking in a store with your partner and your ex saw you and said are you coming over tomorrow?
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