I am really happy for my son as he has found 'the one' as he says! I was not ecstatic about how the relationship came about but as I have gotten to know his partner, who he now lives with, I have become very fond of her and find her great company, most importantly she loves my son deeply. We have begun to spend time now with her parents on a regular basis. A couple of weeks ago my son told us we are going to be grandparents too - after the shock (Im only 41!) we are becoming quite excited about it all. 
I have read many, many threads on here about disasterous MIL/DIL relationships and have had a nasty MIL in my distant past. I want future DIL to feel welcome and accepted into our family, considering our bumpy start, and have been considering ways of making her feel welcome. I don't want to overstep the mark and create any friction within their relationship and my son is not attached to my apron strings (apart from asking for a dish of his favourite meal to be dropped in occasionally)! I realise that I will not be as involved with the pregnancy as if it were one of my daughters but I would like to do something to support her along the way and to feel a part of this exciting event...I considered making a hamper of pamper things for her or maybe taking her shopping but I know her time is short as she works long days. I also realise that sometimes I run away with myself through excitement and that others don't always share the same intensity of excitement with me! 
So, any tips, suggestions, words of advice, even a faux pas to avoid? 