How would you react to this situation..?

Yesterday me,DH,DD and my Mom went to Temple, my DD started crying loud for some reason, DH took her out to calm her, meanwhile me and my Mom finished our prayers
I asked my Mom to sit inside the temple and went out, my DD was still crying, so I asked my DH to go in and finish his prayers and also told him that Mom is still inside the temple.
I went to car parking and started feeding my DD. My mom was waiting for him to finish the prayer and come outside along with him as she was alone can not find the way to the parking.
My DH finished his prayers and did not look for my Mom and came outside the temple. So my Mom just followed him and came out.
This was the conversation later
DH was not around
Mom: Son In Law did not see me, he was coming out so I was tensed as I was alone and came out running behind him.
Me: Oh may be he wanted to come soon as DD is crying, you don't have to worry Mom I would have come back to pick you up.
In the car
Me: Why didn't you look for Mom ? (my tone was very normal, I was in a normal mood)
DH: I thought she already came by herself to the parking lot.

this statement made me very angry, I asked him how could you even think like that when I already told you that Mom is inside, how did you feel like not checking for her, she cannot come by herself and she is new to this place.
my DH repeated the same sentence again "you told me that MIL is inside but you did not tell me clearly to bring her with me, so I thought she already came by herself to the parking lot".

That clearly shows his carelessness towards my Mom. If it was my MIL, he used not even let her go downstairs in the temple to leave her shoes, he himself used to carry her shoes downstairs and bring them while leaving so that my MIL need not take the stairs and strain her self.
why do Husbands behave like this? or Am I overreacting to this situation? I was very much dissappointed with his behaviour.

 

Thanks for your reply!! I know these kind of things happen in crowded places and thats why I told my mom also not to worry and think about it. But the reasoning what he gave actually irritated me, anyways I already let this go yesterday itself.

 

Gauri03,
He is not too bad or too good with parents. But I only feel he is careless. These kind of things happened in past also, when my mom was coming to US, I did not get off from office and he went to pick her from the Airport, Inspite of me reminding him several times, he started late from home and my mom had to wait for an hour after coming out finishing her immigration and baggage stuff. Coming from India all alone for the first time itself is a big thing for her and after reaching US if you don't see your family members for an hour with out any communication imagine how she could have felt.

 

Yes you are right..I stopped talking then and there itself just venting here