Incels.is - Involuntary Celibate

Like the topic title says, if you were in a relationship how would you deal with your gf trying to shit test you? This is something that all normies inevitably have to deal with to some extent and it would probably be hard to deal with as an incel with no experience

Example: You see her receive a Snapchat notification from a guy she has saved in her contacts as “BIG DICK” how would you respond to the situation?