Ayuda

Good nights friends, normal boys, I'm not used to participating but this time I ask for something of help, look, I have my girlfriend, short and chubby girl but tasty, not curvy but she'll lose a couple of pounds if she eats well, she's my work colleague, that's how we met, and we've been dating almost 5 months, so we've been having some discussions lately, I complain to her that she doesn't consider me and she says she doesn't understand her single mother state (she has two kids), the thing is that it seemed like everything was already resolved, passing, but one day before new year's eve, at the turn change, she came up with a proposal: a friend of hers (I don't know him) offered to watch us fuck and then, as soon as I finished inside her (we don't use condoms because she takes care of herself and doesn't want more kids), he would come and suck my semen out of her pussy with a blow job, when he proposed it for me to start, she said she had a proposal but then regretted it and said she'd tell me in a message so she wouldn't see how I was lying (that's what those who are buzos say, that's already an alarm), later almost forced her to tell me in the face, tried to hide my disgust but I think I didn't hide a damn thing because she immediately told me not to look at her like that, I said I'd think about it, and on new year's eve night I sent her 12 messages of how I was feeling and stuff, nothing, according to her she fell asleep, but I had time to think: who is this person, how did they know we didn't use condoms, why didn't she tell me when she said it bothered her too and she wasn't sure? You guys know that when someone proposes something, it's because they're more than 50% convinced the other person will do it, whether consciously or not. unconscious, and then more doubts come out, and that's simply driving me crazy, tell me, without beating around the bush, my opinion is SU OPINION, if I'm here it's because I want a good opinion, please support a fellow in need