I may be Pregnany by a married man.?

Ok girls..I have known this man for 12 years. I have known him when he was separated and divorced...but we lost contact with each other. So october of this year..we hook up through a mutual friend. He at this time..is married again. I have had 1 son 3 years ago. We missed each other terribly and we had in october (safe ) and once on Dec. 20th..Safe . My period skipped late last month. I rememer the condom breaking when we had (ahem... ) but i think it may have tore before that? In all my 35 years..i have never been late. I say i am going to have an abortion if i am..I take the blood test this week..but im not sure. I know in my heart i would only do it for him..not to ruin his marriage. Aside from me having with a married man, This is a consequence..that we both are responsible for. I dont want an abortion..and i dont want him around to pressure me. I have a good job and can make it without help. Any suggestions. Oh yea..he is a gorgeous 57 years old