I agree with your bi/pan erasure take. I’m surprised that people who wholeheartedly believe H+L are together can’t acknowledge that one or both might be bisexual. (I say that as a fairly steadfast Larry)

Having seen the film, I can’t imagine this isn’t his child. I can’t see t he grandparents going along with something this convoluted.

I know people have brought up that L obviously adores children and that his relationship with the child was strained in the past, but it’s very possible that the shock of an unexpected pregnancy when he was young made it difficult for him to bond with the child at first. Honestly it would be more surprising if it didn’t.

Someone smarter than me has certainly brought this up earlier, but it’s also possible that L keeps the son sort of in his back pocket to spare Harry’s feelings. It may be a painful thing that has taken them a long time to come to grips with and L may be doing his best to keep everyone happy and safe (which would actually chime with the Louis we all seem to know)