4.5 y/o dog throwing a fit when my spouse and I show each other affection

My spouse got our aussiedoodle a year and change before I came into the picture. I know, not my choice of dog either but this is what I got. She’s honestly a fantastic dog. She’s fully trained, extremely well behaved, and never sets a paw out of line. I don’t need to leash her (obviously I do, but I wouldn’t need to), she doesn’t bark, doesn’t beg, doesn’t dig, doesn’t chase after anything etc. You’d hardly even know she’s there. She’s like the unicorn of doodles.

I will say she loves on us both equally. She really enjoys spending quality time with us and doesn’t have a favorite.

Over the last year she’s gotten more sassy and more vocal about my spouse and I showing each other affection. It’s been even worse since I got pregnant. I’m almost 7 months along. My spouse will give me a kiss on the forehead, a hug, literally anything and our dog just whines and moans. She will paw at us, cry and bellow like an idiot, try to get in between us and say “MAMA.” She acts like someone shot her. She’s legit a human in a dog suit it’s freaking weird. She doesn’t stop unless we ignore her for long enough or stop touching each other.

She also tends to follow me around more and will nose her way into the bathroom no matter what I’m doing in there, just to check on me. She will often lay down right outside the door if I close it.

Has anyone had an experience with a well-trained adult female dog switching up her behavior like this? She is spayed. Males are fine too but I am unsure if her sex has anything to do with it. The only other thing I can possibly think of is that she might be bored. She has a hip issue that we are working to mend currently, so her walking and play have been modified so as to not exacerbate the injury. The injury doesn’t make her cry or complain at all, she just has an abnormal gait.

Thank you to anyone who can offer any insight!

TLDR; my well-trained, well-behaved spayed adult female dog started getting sassy and vocal about my spouse and I showing affection to each other over the last year. Any idea why?