Just like you make time for chores, make time for dc and relaxing. It's so important.
Have as many meals together as you can.
On the days you have time for longer meals, start a 'would you rather...?' game or ask some discussion type questions and all get stuck in.
Google for ideas.
Go for after dinner walks. Walking and chatting is a great combination. It can help reduce anxiety too. Go for 15 mins if you feel like you don't have much time.
Get everyone stuck in with a cleaning blitz. Either Friday evening or Saturday morning and then relax for the weekend.
Have Friday night movie nights with pizza dinner on sofa or snacks after dinner. Choose films beforehand so you're not wasting time browsing then.
Go out with dc once over the weekend.
Go to parks, country parks, bike rides, fly kites, throw frisbees, kick balls, have picnics, visit national trust properties, take scooters, take binoculars and spot birds, throw stones into streams/ponds and see who can throw furthest.
Go swimming.
Wait for a clear night, make hot chocolate, take some blankets and go look at stars. See if the international space station is due to fly over and look out for it.
Play board games. We usually save them for rainy dull weekends. Same with jigsaw puzzles. Get one and start it, dc will see you doing it and join in. 300 piece would be good to start off with for a 7/8 yr old.
Give the dc chores so you're not doing everything and make sure your dh is doing stuff too.
Write a timetable for chores and do meal plans of easy meals that dh and teen can do.