Baby Sleeping In The Same Room As Couple [THE SCENARIO]

Tonight's scenario comes from a female listener this is what she had to say:

"I am not happy about my baby sleeping in the same room as his daddy and girlfriend. My ex is with another girl for 10 months now. Our son who is almost 3 and he spends 50% of his time at his dads, which is great. My ex has already moved in with this girl and they only have a one bedroom apartment. I have tried to talk to him about it, but he just says its ok and he’s doing all he can do since they don’t have but one bedroom. He says our son has his own bed on the other side of the room with a divider in between. But that doesn’t change the fact that he can hear what goes on in there. Am I being unreasonable by thinking this is wrong ?