"The Flea"

I pretty much think this poem is about how a couple have premarital sex. They have sex and she gets pregnant and she's so ashamed she kills herself and thus kills the baby. The guy feels awful because it's all his fault he convinced her to have sex.

Mark but this flea, and mark in this,---Kind of like an introduction to the story...like in the Fresh Prince of Belair when he's like ok this is my story bout how my life got flipped turned upside down
How little that which thou deniest me is,--- A couple that doesn't deny each other anything and does whatever the other one wants except for having sex
Me it sucked first, and now sucks thee,---They had oral sex but don't go any farther
And in this flea our two bloods mingled be;--- He wants there blood to mingle or in other words unite by having sexual intercourse
Thou know'st that this cannot be said ---She says no they can't have sex
A sin, or shame, or loss of maidenhead,---She refuses to have sex before marriage because she thinks it's a sin and doesn't want to lose her virginity
  Yet this enjoys before it woo,---He is trying to convince it's okay to have sex before marriage
  And pampered swells with one blood made of two,---He's telling her how it will make there relationship better and bring them closer because they are turning two into one.
  And this, alas, is more than we would do.---He finally convinces her to have sex with him
Oh stay, three lives in on flea spare---But OOPS now she's pregnant so thats where the third one comes from
Where we almost, nay more than married are.---He's kind of like uh-oh maybe we should have waited until marriage
This flea is you and I, and this---This is about him, her, and the baby
Our marriage bed and marriage temple is;---Marriage doesn't mean much now because they already are going to have a kid
Though parents grudge, and you, we are met---The parents are ashamed and mad that the girl got pregnant before marriage
And cloistered in these living walls of jet.---She was trapped in these walls of shame and anger
  Though use make you apt to kill me,---She's mad at him for convincing her to have sex and now wants to punish him
  Let not to that, self-murder added be,---She feels so ashamed that she kills herself while pregnant
  And sacrilege, three sins in killing three.---The sin of premarital sex killed the girl and baby and the guy is so struck with guilt he wishes he was dead as well
Cruel and sudden, hast thou since---He is pretty much expressing his grief over the loss of the two people he loved
Purpled thy nail in blood of innocence?---He discovered the girl and is holding her in his arms and so his hands are covered in so much blood and so they look purple
Wherein could this flea guilty be,---He feels guilty for the death of the baby and the girl
Except in that drop which it sucked from thee? This guilt is sucking the life out of him
Yet though triumph'st, and say'st that thou---He's talking about he triumphed in getting her to have sex
Find'st not thy self, nor me the weaker now;---But he feels like he lost because of all the horrible events
  'Tis true; then learn how false, fears be:
  Just so much honor, when thou yield'st to me,---He is describing how she gave him her honor or virginity
  Will waste, as this flea's death took life from thee.---But it was wasted on him because it caused the death of her and the baby and now he wants to kill himself