Please Help, Deceased Mom's Assets Being Mishandled

My mom passed away at the end of October. She appointed her childhood friend, M, to execute the will, splitting her assets 50/50 between me and my sister.

My mom had just purchased a house. She left it to me and my sister. I don't want anything to do with the house, as my sister lives there but has no income. She is living there still and M has been paying the bills using money left in my mom's accounts. My problem is this is draining money to spend on my sister's living expenses.

She used my mom's money to pay off the car my mom left and gave it to my sister, saying they'd pay me half of the value of the car. But there is not a lot of money left of my mom's estate so I worry about this.

She's allowed my sister to use my mom's Uber account. I noticed the other day that my mom is still paying for a Spotify family plan and promptly let M know. So that's been going for months.

M has been pressuring me to move into the house or get an apartment with my sister because she doesn't have a job. I refuse.

I've been trying to get any info on what is going on, and it's seems like nothing is happening at all. It would be one thing if her assets were stable, but money is being drained every month on my sister's living expenses and uncanceled subscriptions.

What do I do? I tried to be nice in the beginning and let M take her time but this seems negligent and unfair.

Also I do not want ANYTHING to do with this house. Can I refuse the house and the debt that come with it?

Thanks

Location is GA