Help do i really need to get rid off my cats?

Phone up your local cat protection and tell them what you have put in your question, they are usually very helpful they might be able to come up with a solution for you. It's so sad that you can.t let them out,If you really have to get rid of them try homing them together as it would be so sad to split them up now. hope you get the help you need from cat protection. good luck.