AITAH for finding out I’ve been unknowingly paying rent to my husband and his mom for TWO YEARS?

I (31F) have been married to Brian (33M) for two years. Right after the wedding, we moved into an apartment he said was a “great deal” from a family friend. We agreed to split rent and utilities 50/50 to keep things “equal” since we were starting fresh and wanted to avoid money fights. So I’ve been sending him $700/month just for the rent this whole time.

Three days ago, at a BBQ, I overheard his mom talking about how “it’s nice getting rent from Brian’s place” and how smart they were to keep it in the family.

Turns out his mom own the apartment, and Brian’s on the deed too, I had no idea. He never told me. Just let me keep paying rent for two years like a clueless roommate.

When I confronted him, he said I “never asked” and that I’m overreacting because we weren’t overpaying. But I feel completely blindsided. It’s not just the money it’s the secrecy.

I told him I won’t keep paying until we talk about a fair setup. Now he’s acting like I’m the problem. AITAH?