For a man: No problem having your girlfriends to have male friends and share certain activities, it often happens with gay friends. I would even say that it is recommended for a woman because you have the 'man' side without having (in principle) the sexual side, it fills a need for a woman
But in this case for Martina:
* she behaves very affectionately with Big Guy, we have seen this often
* sometimes when she speaks on the phone with him, she often stays away from Alberto or goes on the balcony or in the bathroom, we have seen this often
* she goes out with him in the evening or at night, we have seen this often
* he comes to spend time at the apartment when Alberto is not there, we have seen this often
So Martina and Big Guy don't go to church when they are together!
And I add, considering some gay men are Bi-sexual too and in the past I've had a lot of 'fun' with some of them. My boyfriend at the time thought "no problem, the guy is gay". I was able to show a lot of affection to my Gay men friend at the sight of my boyfriends without problem ...every body was happy and have fun .....