Help what does we do!?

try to have a chat with his mum and explain that it was your first time, and you didn't mean for it to happen, regardless once you have done it for the first time, it is kinda hard to just say you won't do it anymore. but if you love each other then that is all that matters and it's not a bad thing you are doing. also try to talk to your mum, i didn't tell my mum for a year, and she was more upset that i felt i couldn't trust her, the whole thing of having did not bother her.