I'm thinking it's because on the weekends they spend more time together dating? I could be wrong. I know the OP said they spend time together during the week but could be that they aren't spending time meeting intimate needs during the week.
I see what you're saying.
Personally, I don't care about "meeting intimate needs" during the week? What does that even mean? I'm not picking on you, Jessica. I guess, I just think that if you're married; that vow and commitment is the main intimate need, and so sex should be on as much as desired (within reason of course, no-one who is recovering from stomach flu, or who just had a baby; should have to have sex).
Life is busy and who's got the time to "date" during the week?
If alexm, or any other married person isn't helping with the chores or childcare et.al., then guess what---it shouldn't get done.
If alexm (or any other guy--we'll use a guy in this example), doesn't help with the chores; then he needs to accept that the laundry won't always be done, and there's sometimes a peanut butter sandwich stuck to the carpet in one of the kids' room, and the car is covered in muck, and we'll be eating canned ravioli.
Because if I'm gonna have sex, I need to feel relaxed and happy. So, if I work all day and he works all day---I'm not doing all the chores. Things are gonna slide around the house.
are you part of the "wife wants me to vacuum" brigade? Do you vacuum? Do you split chores?
Does your wife want to "date" on weeknights?
Sorry if I'm offbase on any of this.