Is my sis making a big deal out of nothing?

Hello ladies,

I need help with a situation.

I had a big plans for my daughter’s bday to go away to Atlantic City for her 17th bday. She requested that her cousin who is close in age comes with us. I spoke to my sis and told her about the trip and she agreed. My older sis is “strict” when she pleases.

So I booked the hotel and got things going. My bf kept mentioning how he really wanted his son (from a previously relationship) to come (being that bf was going to be the only male on the trip). Bf’s son cares for his mom so he really doesn’t do much. I said “well if he can get someone to care for his mom for the time we’re away I wouldn’t mind him coming with us”. Well my bf texted me literally the night before we were to leave to book his son a ticket for the bus cause he’s coming with us.

On the day that we are to leave, I invite my family over for a quick cutting of the cake for my daughter. We get ready and we are gone to our lil family trip.

While out there, I find out that my sister does not like the fact that my step-son is in the trip with us but I brush it off. It is what it is.

Trip is over, everyone is back home. My younger sister comes by and mentions that our older sister is upset that I didn’t mention my step-son was going. She advices that I should call her and apologize. Then my mom comes by and says the same thing.

Now I think things are being taken out of context. I don’t see anything wrong. I forgot to mention it as it was a last minute thing.

So my question for you ladies is, should I give my sister a call explain myself and apologize or let her call me and then apologize? OR should there even be an apology? Please comment. Thanx for reading.

Side note: this kid is harmless and my family only see him on his sisters’ bday.