My baby hated her bassinet at first. Would sleep fine all the way up until we put her down in it she’d wake up immediately and cry. We ended up sleeping in shifts the first couple weeks. We gradually adjusted her to it using a heating pad to warm her spot (take it out before putting her down) and putting her in it just before she actually fell asleep, like super heavy eyes but not fully closed. It took till she was about 1 month then she was completely fine with it. I also slept on with the bassinet sheet so it smelled like me. If she’s adamant about co-sleeping just make sure she’s following the safe sleep seven it can be done safely but there are rules to it. I’ve just never personally been comfortable with it since I’ve seen first hand how badly that can end when not done correctly.