I caught my own mother collecting money from my boyfriend every month

My mum has been collecting money from my boyfriend for 8 months. I found out yesterday when he slipped and said "the 50k I sent your mum last week, she didn't tell you?"

I sat there smiling like I knew. Inside I was calculating. 50k monthly since January. That's 400k. My own mother. She's been telling me the man is not serious about me while collecting his money behind my back. When I confronted her she said "na your husband money I dey manage, you go thank me later."

I don't even know who to be angry at. The man wey dey pay my mother or the mother wey dey collect. Lagos is truly a jungle.