Unwanted new addiction

This post will be a bit long and I appreciate the patient and the advice in advance.

I have to do a little background history in order for you to be able to understand where we are coming from.

We are a young couple with a 7 month old daughter and expecting a baby boy in November (no it wasn't planned, no he is not the unwanted addiction).

We live with my husbands mother for 2 main reasons. 1st we just started our business one year ago and economically for us is better to save money as we are still putting almost everything into the company and 2nd because she complaints that she is very lonely in such a big house.

She has a small dog, a border terrier. She is a very sweet dog but very nervous. When MIL (mother in law) is not home the dog is restless and can't enjoy herself at all. She is compleatly miserable without her. She had 2 other border terriers in the past, one was very independent (flip) and his brother was even worse than the one she has now.

Flip passed away November last year with liver cancer (same way his brother in 2014) and Popy is now her sole dog (poppy also has Spike disease).

2 weeks after flip passed away she already started with wanting to get another border terrier. We reasoned with her that it is a hunting dog and not the best for young children, we explained how border terriers have that dificult coat that shouldn't be washed and that we all stink because of that and that she has plenty other dogs to choose from. She agreed to get a border collie instead(she likes active dogs).

To be completely honest I really dislike border terriers. I'm not a patient person and they are really stubborn, I kinda gave up on them after 3 months of trying my best with them. My husband also doesn't like them, we are more of big dogs type of people.

After a while she came back with the border terriers and we had to talk with her husband about it (he lives in another city but comes home every weekend) and he simply forbidden her to get any hunting type of dog for the sake of our child. We also made rules about it having to be a puppy and not an asylum dog because we never know how it will turn out. She agreed to all of those. We thought she would simply wait until we go out of the house (we were making plans to move out in maximum 2 years time).

Months passed and she kept going about this until finally she seemed to quiet down. Today she comes home announcing she pre ordered an asylum dog from Portugal that is 2 years old. It's a teckel with wired coat (just like the border terriers) and that she will be going to get it this Saturday.

That is a copy of a border terrier, he is not a hunter but is pray driven, he is also stubborn and has all the other characteristics to why we didnt want a border terrier. If you look at a picture of the face of a border terrier and these dogs they even look the same.

The worse thing about it is that she went behind our backs and talked with everyone else (her daughter and her husband mainly), and only announced it to us the day that dog was flying to this country.

We feel completely betrayed and left out, we feel like she didn't care about our opinion and the fact that we have to also look after this dog as she works full time and we work from home. She simply did not care and we don't know what to do. The fact is that this is her house and she has a right to do whatever she wants with it, but she didn't think about us or even about her grandchildren.

The dog has now arrived and he is a very nervous dog, he was crying for no apparent reason. I asked if it's maybe because this is a new environment but my MIL said no, she said that the dog is scared by nature and I could not believe she was saying this at all. She had the possibility to cancel if she tought the dog wasn't suitable to a home with children and to me a nervous dog is not suitable! I am in shock and I know I have to talk seriously to her about this with her. I feel she is way too positive about this dog only because she wants it so much but there are so many other dogs in this world that are not nervous! She feels that we are being too negative and that we should give it a try. We changed all of our daughters stuff into another living room (with more space) because we don't want the dog near her and my MIL was ranting about how we are not even going to try and introduce her to him.

Please someone tell me I'm not being a little b about this, I mean my daughters safety is more important to me.