Melissa, Spencer's sister
No
Issaic
WARNING:SpoilerALERT No Aria doesn't become pregnant in Pretty Little Liars. Although she does fool around with one off her teachers
She isn't pregnant because she is a lesbian.
Issac.
Yes Emily Fields gets pregnant to Issac a boy she dated and had sex with that helped her realise she is Bi, she had it during the summer and hid it from her parents. I LOVE PRETTY LITTLE LIARS
No.
yes
there's no Louis in pretty little liars.
Pretty Little Liars!
A is probably someone who wants payback/revenge. They don't like the liars so they are torturing them.
someone dies and they have a funral for that person...