My sister is really bad about spoiling the dog

My sister is really bad about spoiling her dog.

I keep making fun of her for it, but she doesn’t seem to care.

She loves this dog more than life itself, and it is really like the dog is just like her kid or something. I keep telling her that she has really hairy genes because her son is super hairy, but she doesn’t think that that’s very funny. Anyway, she spoils the dog like crazy and just when I think that it couldn’t get any worse with her, it does. I just found out the other day when I went over to visit her that she is having a special house built for the dog out in the backyard. It’s not just any house, either. It’s like a tiny little mansion. The day that I was there, an HVAC truck showed up and when I asked what they were doing there, my sister explained that they were there to install the heating, air conditioning, and ventilation system in the new doghouse out back. I nearly choked on my coffee when I heard this. I mean, the dog stays in the house most of the time anyway and so I don’t even understand why it needs a house. She says that he needs his own space sometimes. Not only does he need his own space, but apparently he needs his own little heating and cooling system. She’s even getting a little air purification system installed in the doghouse. It’s really the craziest thing. Sometimes I worry about my sister because I think that she might be losing it!
Cooling expert