Fiancé hiding money and lying

We just moved out of our apartment a month ago and we were expecting a check for our deposit. We ended up getting back double what we thought we would, but he hid it from me. He told me we were getting the original amount and only spilled the beans when I was right in front of him when the check came. We don't have a "your money, my money" situation, our money is combined and we both paid the rent and the deposit from both of our paychecks. I don't have any kind of spending problem and neither does he. We just had a baby and NEED the money so it's not like he was saving it for anything special

He just always has to tell little lies, and they're totally unnecessary. We could pass his sister on the road and he would tell her that we went out to eat when we actually went to the store. We'll be 15 minutes away from somewhere and he'll tell them 5. Like today he goes into work at 1:30 but had told me 2. He didn't forget, he was looking at his schedule. We might go to one sister's house but he'll say we went to another.

"Do you speak Spanish?" "yeah a little" like bitch Spanish is literally your first language. YOU WERE BORN IN MEXICO, YOU DIDN'T LEARN ENGLISH UNTIL YOU WERE 5

He just always feels the need to lie and they're so pointless.