Was this a third party invite?

[gegevill]

My stepmom‘s mom called me and invited me to go eat dinner with my dad and my stepmom and the rest of the family but me and my stepmom really don’t get along and she never let me know that they were going out to eat but I knew because I got invited by her mother and I called my boyfriend because he’s out of town and said that we got invited but he can’t make it because he’s not home and he just told me her mom calling me inviting me to eat was a third person invite knowing I have problems with my step mom so my question is was it rude for him to tell me that it was a third person invite Or is he just mad because he can’t go

[Guy13]

I hope you called her directly and expressed your regrets. His Mom wanted to check you out alone too. I hope you went.