love living so close to my friend and we've many good times shooting the breeze over the garden hedge while her kids (3&5) get free reign to romp around my yard to their hearts content. :) Work from home much of the time so always around to keep an eye on them. since turning 30 they have provided me with an outlet for my ridiculous broodiness (that seemed to switch on like a light after the hangover from my birthday). extremely fond of George (3) with whom i have the most wonderful understanding and embroiled in a hilariously mischievous kinship with Alfie (5). since our houses back on to each-other it is not uncommon for me to find them either in my yard, or frequently in my house entertaining themselves or getting into trouble. I leave the back door unlocked when i'm in the house as i rather enjoy the way their little visits break up the day. :)
Recently though i've noticed these distractions getting less frequent. A fortnight ago alfie and I were out in the garden looking at mini-beasts and having a pop at worm charming. everything seemed fine although at first he seemed a little offish. later, when i suggest to alfie that we go inside to wash our hands before i take him back for his nap, the poor wee man starts balling summat about the house being bad and his daddy saying he ought not to go there. Spoke with my friend who explained that her partner did not like my having such a close relationship with her or their children and had been telling the children to stay away from my place. 
Things between her partner and i have never been brilliant. There was an extremely awkward moment a couple of months ago when both the boys came running over after George injured himself and their father overheard one of them calling me 'dad' . Now this has happened a couple of times and i usually always correct them at once. just this time george was bleeding and it was all a bit hectic so there was no "I'm not your father kid." I just flew into action with the first aid box and all that jazz. clearly my friends partner took this badly and the two of them had a fairly bitter row about it. Did feel a little bad, but it's not like i engineered the situation and it not really my fault if he chooses to spend the small amount of time that he could spend with his children in a bar with his mates. Don't get me wrong, i can only imagine how it must of felt for him to overhear his kids calling someone else dad, but is that my fault? is it okay for him to ban his kids from entering my house because he thinks im some kind of threat?
Christ, he's one of those guys that can't quite comprehend the concept of a platonic relationship between people of opposing sexes. any ideas as to how i should handle this anyone? she seems content to bend to his will (at least for now) and i'm left wondering what on earth i did to deserve to be treated like some kind of creep. ARSE! 
I miss the boys and i just want to scream at her for allowing all this and not having thrown him out months ago like she keeps planning to.
It feels stupid having to tip toe around this crap though. should i just go along with this? at least until it all calms down a bit? My friends children are like an extension of her, hold as much affection for them as i do for her. they've always hung around at mine, we often eat together because they tend to be less fussy about food that way (i used to be a chef). So now my days are mostly work and the only unexpected break i get is the odd item on radio 4 or cold callers.
AIBU to be angry at my friend for letting this crap fly?
Is it stupid to get this upset about things?
Should i simply find some poor wench silly enough to have children with me in a poorly thought-out attempt at quenching my now overwhelming broodiness?
Sorry for long post. Thanks for taking the time to ponder my imponderables. open to any suggestions/ thoughts and grateful for any advise.