Alex looked at Liza with lots of love in his eyes. He could not explain how much he started to like her now after saying those words. All he could say was that it was a blessing fallen from high heaven.
He before just wanted to say that his physique forced him to have a strong urge for sex as he thought it would be too obvious if he said that he needs to have sex outright.
Others are easy to handle but FL is like Sandra could not be tricked by him at all with these petty lies as her FL sense will tingle and she will find out he was lying to her.
But if it was said by Liza, A doctor but most importantly a woman that would be a different case as FL tends to believe females more than males, As most of FL is wired like that by the author.
So it's understandable how good Alex is feeling right now. Thanks to her not only is he can able to push Sandra till she could help him with other women but also he did not have to pretend in front of them.