I caught my husband pushing his hand into my vagina next to his while he was fucking me and he said it was an accident how do I confronted?

He literally had his hand next to his dick but in my vagina as well and he said it was an accident as he was trying to get into the right position. He was looking at me and his eyes were in shock when I saw. Am I just being paranoid or did he actually do that on purpose? He has never done this before so I’m not sure if I should confronted him or not.