Why did my boyfriend lie to me about what he was doing?

Anonymous
This past weekend my bfriend told me he was going to a ‘kids party’ with his 6 year old daughter he shares with his ex. Fast forward a few days later im scrolling through my social media and a photo of him at what appears to be a farm pops up. It’s not on his profile (we don’t follow each other at all by his request) but a community farm page that I follow. I click the link and look at all the other photos they’ve posted and it turns out he was not at a kids party or with his daughter at all but met with a whole group of people he’s never mentioned to me before to work on this little farm planting seeds for some event. I ask him about it and he says he ‘ran into them coincidentally while dropping his daughter off at a house next door and they asked him to join them at the last minute. So I asked why he didn’t mention anything at all about this? In fact I remember when he got home he told me he was too tired to do anything because he was playing with kids the whole time at ‘the kids party with his daughter’. All he actually did was drop her off and then join this group on the farm. A lot of the photos were of him next to or talking/laughing with the same attractive woman. When I brought that up and he got angry and told me he didn’t mention it at all because he knew I’d overreact. What would you do?
Why did my boyfriend lie to me about what he was doing?
6 Opinion