Im just very confused at this point who George (dad) likes, Mary or Brenda.

at the start of S5 he went out for drinks with Brenda because he had trouble at his house (Missy crashed out because of her boyfriend) And Brenda told George if he wants shots, he said yes. After they talked while being drunk, she asked if he wants to come over to do the you know what. But before he could answer he got the heart attack.

Questions I got:

1.If he sad yes and they did do it. What would happpen next?