I never thought I'd be speaking up for Mo but he seemed to be making an effort to be truthful (ish). he could have easily just answered with a flat out lie "yes, I love her and that's why I'm here" but instead he tried to say something more accurate, the whole 60/40 thing. I would guess that the ratio is more 99/1 but he's not a total and complete liar, he's just not.
I'll also go out on a limb and say Danielle just *might* be the type of person who hears what she wants to hear and is not the best at facing reality or at being truthful. Whatever her mental and emotional issues are (and I waver on that, sometimes I think she plays dumber than she is as a means of manipulation, sometimes I think she needs an Appropriate Adult 24/7), I think she's pretty sketchy with the truth as well. I wouldn't be at all surprised if Mo and she had actually discussed this "relationship" on a more truthful and practical level: Mo wanted to come to the US; Danielle wanted a partner to help her out (with the girls'eseses); they liked each other (not loved) and would act as a couple as needed in service of the arrangement. And then Danielle got clingy and needy and lovey. It would explain why she harped on him helping the girls and letting down the girls so much.
If forced to chose, I'd have to say Team Mo.