<human>: So my boyfriends friend who he's been friends with since high school, about 12-13 years, invited us last week to go to a theme park with him and his girlfriend today to celebrate him graduating college. Out of nowhere this morning this friend, we will say Tim, texts my bf and says "dude my friend had her baby this morning (who lives in another state) so we can't go out today in case she wants us to come up and see the baby. So we say ok it's cool. I already canceled working overtime today to go so I was a little annoyed but whatever. 

So it's later this evening and Tim's sister in law (Tim's brother who my bf also grew up with as a best friend) texted me and said "so Tim just called his mom (since the brother and sister in law were playing board games with her in town) and said he was on the way home from theme park." I got pissed. Apparently Tim then called his brother and said "don't tell anyone we went to theme park" I then told my bf and he said "text him and call him out" so I texted and said "you and your gf went to theme park?" He said no they didn't go. Completely lied! Then the sister in law told me (after it was too late) not to say anything cause she didn't want her husband, the brother, to get mad that she ran and told me.

Should I or my bf confront him and tell him we know, which would rat the sister in law out? Or just leave it alone? I know this sounds confusing and maybe a little obvious and dumb but just need some outside advice.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Friend of ours invites us somewhere then bails last minute, then come to find out later he still went and is lying when asked about it.