Husband keeping doors locked!

So here’s my issue I recently paid money to build my husband a shed. The agreement was I would have access but it’s his shed for his tools and stuff. We’ve had a rough relationship yes I have snooped into his stuff in the past. I also don’t really think I’d go in his shed it’s the principal of having something locked and I can’t have access! I don’t keep anything locked because I have no need. I thought we made progress this year in our relationship. I’m more hurt. Up until now for the last 4 months his stuff has been in a storage unit. We got into fight he was going to leave us. Anyways didn’t happen. He asked for a shed I agreed, but under the circumstances of no lock I couldn’t get into. Anyway today happens I find out he has a lock on it. Says I have no need to get into it. I’m instantly furious he sneakily put one on. I tell him I need access and we talked about this. He goes onto to tell me it’s his stuff in it. Okay and I probably won’t go in anyways but it’s the fact he fees I need to be locked out. We get into an argument he threatens me and says I’ll never get access now. So now I came to okay keep your stuff in the storage unit because now it’s the principle. We have. 2 year old and another on the way. I find it ridiculous am I wrong?