This is my first post but I've been lurking on this site for a while.
My sons dad is a good dad so I'm in no way looking for reasons for him not to see son.
My son is now almost 5 months old and sees son regularly and also has him overnight every couple of weeks. He has a travel cot thing for son and he told me that son won't settle in it and that he just cries whenever he's put down, so he co sleeps with him. I don't do this and my son settles fine in his cot for me (and does in the cot here for my ex when he's doing bedtime).
I'm not sure that he's looked it up online either, he just has son next to him.
Would this worry you?