>>42409994
looking behind the spiderpone she seems to be fully spider from the shoulder(?) down, so she'd likely have spider biology like the epigyne (spider labia) hiding a gonopore (inner spider pussy), with sperm storage tanks attached. Horse pussy is useless here, it can't store your cum or nonstop pump out batch after batch, hundreds of your spider hybrid eggs, thus ruling it out.
Normal mares can't compete.
