GOOD IDEA!! To just get up and do it. That will break the routine for sure! Tell her you feel like going for a ride. She may not want to put this task on you. She also may be one of those women who feel like even though they work outside the home they have to be the typical woman who does everything in the home also. That can make you tired for sure and have no ambition left for anything else.
Because something else caught my eye in your post....that you guys come home from work discuss your dauy and then SHE starts getting dinner ready while you relax. See if you think about it she does work also but has this daily task on her and then has dishes to do to boot. So maybe break this routine also and tell her why don't you take a bath or sit and relax while I get dinner done tonight. Or if you want to be a little more aggresive why don't you tell her to go take a nice soak and get prepared for the awesome orgasm you are going to give her tonight. But maybe the break of her having to cook every night will be a burden off her shoulder.
If talking about your sex life has been something you have never done,it is possible you can accomplish this. Start off small maybe like if you are performing oral sex stop a second and ask her if it feels good. Maybe move around the vagina a little.Experiment,Try using tongue and then fingers. But ask her each new move you make if it feels good. Ask her to tell you if it feels good. Maybe try foreplay until she is squirming and then ask her to tell you she wants you inside her. LOL Sorry if this is blunt. Just know at first when my husband tried this with me I was so shy and it felt a little ackward at first. But now it is something that just comes natural to me. I am very open about sex now. It is great to be vocal and tell him what I want and for him to tell me what he wants.