I'm glad you didn't ask her for a DNA test. That's between her and ds. However, to be realistic, since she moved on with a new bf so quickly, a DNA test seems very much in order. I hope ds decides to get one.
I'm NOT suggesting you advise him to do so. He's likely to repeat that to exgf, and then she may get angry at you. I'm glad to see you're not touching that issue. It's something he'll have to come up with on his own.
But DNA tests are expensive aren't they? If he brings it up, will/can you offer to pay for it? As I said, he needs to know you're there for him, too.
Also, if he ends up being a "part time dad," will you help him out with childcare, etc? If you will, have you let him know this? I don't mean do it all for him while he goes running around with friends and smoking cannabis. I just mean "help out" and maybe babysit one evening if he has gs for a weekend, etc. The idea of having to parent a child may be very frightening to him right now - just as much as having to help support him. Here again, he may need to know you're in his corner. I DON'T mean that you should push him to be involved with this child, and I don't get the impression that you're doing that. I'm just talking about IF he ends up being part of gs' live.
Recommendations please, for a stopover on the way to Loch Tay
Have any of you got all electric cars? Pros and cons please.