Me (23M) and my girlfriend are (24F) in a open relationship for one year and a half now. We have a strict condom policy.

My condom broke with a woman. She isn't very sexualy active, I'm just her 3rd sex partner, so I ain't too worried.

The problem is that me and my girlfriend are reuniting this week after 3 months apart.

I know some STDs have long incubation periods, but I think that a 2-week horizon is good for most stuff.

The Non-NP was already planning to do a STD test so that we could do unprotected oral sex (as per my arrangement with my girlfriend).

My girlfriend is very worried about STDs.

Questions.

1- Am I the asshole for suggesting to the Non-NP if she could accelerate the day when she plans to do the STD test?

2- How should I tell to my girlfriend? Give the full disclosure, including the background that the Non-NP isn't too sexualy active and that she's likely to do a STD test soon or just say the condom broke?