Talked to my close friend about sex with my girl and it came up that she can’t cum during vaginal sex.

his first response was it 100% means she was on the CC if she can’t cum from vaginal sex. I never asked her “number” but now I can’t stop thinking about it. If been with 7 girls before her and this has never been an issue. Been together 2 months. Is not being able to cum during sex a legit sign of the CC? Like pairbonding or whatnot allows for better sex and a connection? That would allow a girl to cum easier?