<human>: Give me the gist of the text in a nutshell

My mother died on Friday, and I was the first of three siblings to be notified (I have two brothers, both of them estranged). I have been the one in charge of most everything because of this, even though I am not officially an executor of anything. There is no will that can be found. 

We had to buy some things on both Friday and Saturday for this undertaking, such as new locks for the house (it wasnt secure really at all), supplies for the cats left behind, gas to drive out there, and a pizza for Friday night when we were cleaning the house.

I did a bonehead thing and took some bad advice and used her debit card as a credit to pay ONLY for these things, because I was told that these were fine to do because they are expenses. When we took her death certificate to the bank today, the bank associate seemed a bit on the suspicious side after looking up her account, but didnt really say anything, just that it cannot be opened until 30 days after death and made a copy of the death cert even though she said they wouldnt do that until the 30 days are up. She also took the debit card before looking up this stuff. 

Now, what are my options here to fix this, if it needs to be fixed at all? Can I just go to the bank and say that we noticed the charges aren't applying to my account and may have accidentally used hers instead of mine at the time (both of us use the same bank, so somewhat believable)? Can I just pay them that money and it be taken care of?
<bot>: Used moms debit card as credit to pay for some expenses at the time; can this be fixed with a simple lie and payment?