Dr visit

Just want some opinions. My and husbands familes are visiting us for the week from out of state. This will be their only visit with us until after baby's born. We have an ultrasound scheduled for in the morning which id love for my mom to go with us since this would be her only chance to do so. She doesn't want to go if my MIL doesn't go, as she doesn't want her feeling left out... It's my husband and my decision and I'm torn. I'd prefer it just be me, him, and my mom, but doesn't look like that's going to work. Should I just invite my mom AND MIL? I really would love my mom to be able to go, so feel like I should just suck it up. Argh. What would u do?