Wife said she feels rejected because I didn't want to have sex

My wife and I have 3 beautiful children. We just had our 3rd 4 months ago. I know she's been insecure about her body and I've been trying to build her up. My wife's sex drive has been so extremely high. I have an average sex drive. I don't mind having sex everyday but it's been her wanting to do multiple rounds multiple times a day. We have had sex 4x a day for 9 days straight and at this point I don't want to have sex anymore for a little bit. Not forever obviously just I just need a break. She tried to have sex with while earlier today and I said I would rather cuddle which she got upset with and didn't want to cuddle. Then I was playing SIMS on my computer and my wife tried to have sex with me and and I again said no. I was doing something. She doesn't get SIMS but I've been playing it since I was a kid so I enjoy it. I was just doing a little me time and she was upset that I rejected her twice today. We have had sex 4x a day. 9 days straight. I told her I just wanted a break. She started accusing me of being gay saying any straight man would jump for this much sex. I am honestly tired of having sex. Maybe it's wrong to feel that way and I don't mean to upset her. I'm just tired and want to relax