One year in but a newbie

[Lifes Twists]

So Easter weekend was interesting. Originally I was told she and my youngest would be spending Easter with her sister. That wasn't a problem since it was family. Then an issue came up with the dog they got and we had to have a family meeting to discuss it. That was resolved, but I found out that supposedly her plans fell through. I asked what they were doing and she said she had an invitation. I said if its with the OM then I would prefer to have youngest with me for Easter. She got angry and started bad mouthing my family in front of the kids and why would youngest want to have Easter with them. I did not react, rather looked at my three girls and told them they were growing up. They would not be spending every holiday with either my wife or myself as part of growing up. I said they had the right to choose and did not have to go with either of us if it was uncomfortable for them. My youngest thought a bit and decided she wanted to hang with my oldest at six flags where oldest is working. I suggested I could go with her since her sister would be working and she could hang out all day. She agreed. I think what my wife said sunk in with the girls a bit and how she attack their grandparents. On Sunday my youngest called and said she had changed her mind and was going to spend Easter with me and her grandparents. My wife had to do her own thing without any of the kids.

Today I picked up my youngest and took her to go get fishing supplies. We were going to go fishing but it is raining too hard. When we pulled in to drop her off, I noticed a car pulling in and a guy got out and went towards the door of apartment. I had pulled in next to him. I heard his phone go off and he turned around and went back to his car. I asked daughter if that was OM. She said yes. So I backed out and went to another part of complex till they left. Then went in with daughter and set up fishing poles for tomorrow.

How have people handled this in the past? How have you reacted?
Did I handle this correctly by driving off and not going about my business with daughter?

I could tell the guy looked a bit nervous and hesitant when he got the text from wife and then figured out it was me in the next car.