Try to end all the tasks that you have at home before afternoon as it is possible that you will have a lot of plans today. Do things well-done.
Even when you are not your own boss, you have a great capacity to lead other people to do what you want. You have a complete leader capacity that you need to exploit.
If you suspect that your partner is cheating on you, you have to start to see if this is true and where she spends all her time.