Do I owe her this?

My wife refuses to haves with me. She says she can't enjoy it with the thought of getting pregnant again going through her mind during . We have three kids now and don't plan to have more. We were using condoms until she decided to not have anymore. She thinks that because she gave me three kids i owe her to get a vasectomy so we wont have to worry about this anymore. I'm only 25 yrs old and am not sure if i want to get one right now. Should i do it?