blond joke twins

this blonds boyfriend was in the drive way waiting for the blond to come out and the blond came running out and she started jumping up and down like 10 times and he said "what are u so happy about?"
and she said "we are having a baby!"
and he said "thats great!"
and she said "we are having twins!"
and he said "how do you know?"

she said "i took two pregnancy tests and they both said that i was pregnant!"