My dog is avoiding me since pregnant

We have four dogs, two indoors, two outdoors. My two outdoor dogs are acting the same as always. My indoor dogs aren't. I have two inside pitbulls, who are the most loving dogs ever to anyone. Guilty of kissing you to death or getting you with that insanely wagging tail. My female has puppies in feb 2016. The male was good to his woman through it but didn't know how to handle the babies, my female first time mom And was a rockstar with me by her side. She's been my baby and all are spoiled, but my fiancé says I spoil her more. I haven't changed how I love on any of our dogs, but she has resorted to no longer being by my side, sleeping next to me, being my partner in crime. They all are crate trained and the doors are always opened when we are home. Neither go in there unless it's time to leave the house. But she is now just hanging out in there. I go in there and lay with her and she loves on me and is happy. I try to get to come to bed or couch with me (she has a thing for soft blankets). She is there when I'm cooking and what not. But during the down time she is now alone. I miss my baby girl being around and her male pit does too. He misses her with us all resting and going to bed. He goes with me to tell her night every night and they kiss and he tries to get her to come.

Vet said she's in great health. Both have gone two weeks ago. She changed around week 5 of my pregnancy. Any one ever have this problem? It's depressing and anyone knows me, I love my four wonderful step kids and our four dogs and the pits are my babies.

Sometimes she will sneak in, in the middle of the night to our couch in our bedroom. Some nights I fall asleep with our male pit asleep on my feet and wake up to her there. But the fact she isn't around now is depressing. When my fiancé works nights and kids are with their mom, I have our pups and now it's like I don't. My male pit and myself are sad over this. Any suggestions???

You can see by the look on my males face he's sad too.

You can see from the photo below she is spoiled and loves being in my soft blankets. 😞miss my pup.

When we first found out you can see she would lay on my tummy. Her counterpart sleeping behind her.