Advice for improved Sex Life

I'm 43(M). My marriage is great. But would like to ask women out there my age if what advice can you give if I were your husband. My wife enjoys our sex life. But now she's almost tired every night from work. And at weekends, our errands get late and so we end up having not able to have sex anymore since we both are sleepy at night.

tl;dr Seeking advice from women in their 40's