He knows his sibling is in there

So I have a 6 month old beagle puppy and I swear ever since I found out I’m pregnant he has been so attached to me. He literally sleeps next to me and my bump, he follows me around the house, and makes sure I’m okay. He won’t jump on my stomach anymore he his literally so careful with me. This is probably the most precious thing I have witnessed. My mother in law kept telling me I needed to get rid of my animals because they are a danger to babies, but in all actuality they have natural instincts and are super careful (at least from what I’ve learned and experienced).