Her BF has chosen who he has sided with. He has not called her for the greater part of a week... and this is the time when he'd be lovestruck, excited and passionate about her...
Imagine a year down the line.... he'll be joining in with the disgust of her.
If your DD starts out in a relationship like this, it will only ever go down hill. The entire family looks to be complicit in trying to bully HER into aborting her very possibly only chance at a child. This is societal and familial abuse in the making. For an insight into the 'honour' system, have a look at the Panorama programme shown last week. It'll still be on BBC iPlayer.
I think it speaks volumes that many posters commenting here have come from comparitive backgrounds, but have been well educated. I would suggest that the BF family doesn't fall into that category so much, as the mother's lack of English in 41 years indicates her isolation from the outside world, her daughter's phonecall asking for the termination indicates that she too is indoctrinated/brain washed into believing that this approach is acceptable, and that your DD needs to conform, or else.
If I were talking to your DD, I would ask her to give IMMENSE thought to NOT putting his name on the birth certificate... just in case it all goes tits up. If this guy has PR, he would be able to get passports done for the child and there could be a potential abduction risk.
IF he mans up, and stands up to his family, backs her 100% and more, THEN she thinks he might be worth a punt, and eventually marries him, all being well his name can be added to the certificate IIRC. I don't for a second think that this will happen though.
Until such time as she is 100% sure of his (and his wretched family's) motives, then she needs to take as many steps to protect herself and her child.
Her family BTW have NO right at all to look down on her when their own son has served time. TWICE. What decent woman from a good family from their culture would accept HIM as a groom anyway? They seem to think they are trading in gold when it comes to him, by the sounds of it, he's DAMNED lucky to have a GF like her.
SHE can (and WILL) do much better than him. She needs to see that, and she needs to set a FLIPPING high bar for him to come back to her. A mere mumbled sorry is not enough. From here, your DD looks like SHE holds all the cards here, she has all the options and choices and should not EVER compromise on a single thing to be with this man-child.