Annoyed

My newborn ate around 9:30 and is supposed to be sleeping right now... he's been up for 2 hours now. My MIL just got off work and came in the room and picked him up when i was trying to get him to sleep. Now she's up walking around and talking to him keeping him up more. I'm annoyed because she's throwing off his sleep/eat schedule and he keeps yawning. By the time he goes to sleep it'll be time for his next feeding. She says he sleeps too much (he eats every 2-3 hours then sleeps) and keeps trying to make him stay up. Like what do you expect... he's a newborn baby it's what he's supposed to do right now 🙄. I hate when people try to tell me what to do with MY baby. It may be my first baby, but i know what i'm doing.