Time together as a couple even if it’s when children are in school or childcare. Dates that are fun and not stereotypically “sexy” - some of our best have been playing a new sport together, lunch and a good chat, darts bar. Something fun with an edge of competition is good!
Take the idea of sex of the table for a while, be genuine and affectionate but without it feeling like you have an agenda (if you start snuggling up and kissing her at 10.30pm in bed, it indicates you want sex. If you give her a proper kiss before leaving for work, tell her she looks gorgeous when you’re out for coffee, it makes her feel nice but without the pressure). Think about how you would have acted when you first met, when sex was never a guarantee and you were excited for the flirting, first kisses, touching.
Make sure she has some time for herself regularly. After a long day with toddler, half his dinner down my top, hair in a bun for bathtime and legs I haven’t shaved in days, the last thing I am thinking about is being sexy for my husband. A hot bath and a glass of wine while he does bedtime & tidies the house - much more relaxed and in the mood.
Encourage each other to have a bit of a life outside the kids - hobbies or sports, make sure you both get the opportunity. A bit of space from each other and family life can often be good & gives you more to chat about than what shall you watch on Netflix.