Jealousy is a sign of deep unhappiness about something in your own life.
the op is desperately trying to find something to sneer at, and she’s grasped and come up with nothing so went down this silly route.”oh he’s older”.
op I am guessing you’re single or not in a good relationship , not happy with your own housing situation, don’t have much money, so don’t have the holidays etc, prob don’t have kids, not a happy person at all, and you want what she has, Inc the attractive husband, the house, the kids, the holidays, the money, the wedding, and the happiness.
You need to realise when you’re jealousy is eating you up so much you behave in this undignified manner, you will never achieve it.
and you aren’t her friend, you aren’t in her social circle, you may know her and be linked to her, but you are not friends and you don’t socialise together, you are at best on the periphery, on the outside, looking in.
Try to focus on how to improve your lot in stead of this undignified shit.