Dear BL readers; my girl blurted out to my friends that she's had an abortion before

From a male BL reader

I, my girlfriend and three other friends were having a jolly discussion last night at a friends house and while talking, my girlfriend threw up. One of the ladies there jokingly asked her if she was pregnant.. and my girlfriend laughed if off saying no, that if she was pregnant she would know. The lady asked her if she'd had child before and girlfriend said no but she'd been pregnant before but she had an abortion. She said it so casually like she was talking about the price of aso-ebi.
The abortion was for an ex-boyfriend, not me, so you can imagine my embarrassment. I called her later to blast her over what she said and insisted it's not a big deal. How is abortion not a big deal? If she can confess to one, how many has she done? I'm thinking of breaking up with her. Would I be right to do so?