Guests over every day during Stay at Home Order and has key

[Guan Hong Guo]

My family rents out the 3rd floor of our house to support our mortgage and we had a new tenant move in this month. Since they have moved in they had a friend come by almost every single day. Generally I would not mind guests coming over once in a while but I was not expecting this friend to be over so frequently, especially when our state (Connecticut) is under a Stay at Home Order. I had a clause in my lease that says overnight guests are limited to 3 consecutive nights, however this person doesn't stay for the night, but is always here. Plus, he has a key!

I'm not experienced in renting so I would appreciate any advice on what rights I have as a landlord. I know laws tend to favor the tenant.