I tend to be very careful about either natal or horary questions relating to children. We now live in an age where fertility treatment is available for women who can't conceive, so the natal promise might well be modified to allow for that at some future date. Don't taken the chart as a final statement.
Strictly speaking, before looking at fertility, we should look at marriage - no union, no matter how fertile you are, means no children. However marriage is a much muddier area than it used to be. So I'm not really going to pay that much attention to it (unless you want me to).
William Lilly gives a good account of making an assessment of whether there will be children and how many there will be.
This involves looking at fertile planets - Jupiter Moon, Venus, and also the North Node. In particular, fruitful planets in fruitful signs is an indicator of high fertility.
You have Jupiter in Scorpio (fruitful planet in a fruitful sign). By whole sign houses Jupiter is in the seventh, which adds to its significance.
Moon is in Cancer - fruitful planet in a fruitful sign - it is also trined by Jupiter again boosting indications of fertility.
Venus is in Aries, which is middling, not fruitful but not barren
The North Node is in Cancer. Again a fruitful significator in a fruitful sign.
Of the Barren planets, Sun is in Gemini, a barren sign. Mars is in Libra, a middling sign, Saturn is in Libra a middling sign, and the South Node is in Capricorn, a middling sign.
All this points to children, and more than one.
Planets in the eleventh and fifth are also indicators of children, but there are none (using the traditional set). This does not reduce the number, it simply doesn't add to it.
Counting the fruitful planet/sign as positive and barren planet/sign as negative we end up with three positives and one negative - say two children. It could be more because of the Jupiter in the seventh to Moon trine.
As all but one masculine planets are in masculine signs, this would be taken as an indicator of male children. Personally I have some doubts over this, as there are more masculine planets than feminine.
For him the situation is:
Fruitful planets - Moon in Aquarius, middling Jupiter in Leo barren. Venus in Gemini, barren. North Node in Virgo, barren.
Barren planets - Sun in Gemini, barren, Mars in Taurus, middling, Saturn in Virgo. barren, South Node in Pisces, fruitful. Mercury is in Cancer, a fruitful sign but it's aspects to Saturn and Mars, render it barren.
Planets in the fifth - none. Planets in the eleventh - 1 (Mercury).
This suggests that he's not very fertile. Bearing in mind my point about fertility treatment, that doesn't rule out kids and indeed as you are very fruitful, so that might increase the chances by itself.