I just recall my mom being gone at work. She was tired at the end of the day. We got what was "left" of her. I wanted to be a mom first and not have my kids get the burned out side of me for dinner, brief play and bed.
I am also tired when I come home from work. My kids are tired when they come home from daycare/school/camp. But they get my undivided attention until they go to sleep.
After dinner we have play time. Then it's time for bath. Afterwards, we spend a luxurious time cuddling together in bed. (until they are SO READY to go to sleep). It's all about the QUALITY of time, not the quantity.
Once the weekends come, it's all about them. In fact, I can't remember a day when my husband & I actually did something WE wanted to do. lol. But the kids are our first priority. Hey, if the mom is happy, so is the rest of the household. 