Why? Did Allah choose Isa(Jesus)(as) out of all the other prophets to be born a miracle? And choose him to come back before day of judgment?

I usually have debates with my mum who is a hard core Christian and every time I tell her that Muhammad(pbuh) is the best of all creation she tells me 'then why did god choose Jesus(as) out of all the prophet to be born a miracle and choose him to come back at the end of times?'.